Prorrateamos el saldo pendiente; dejamos constancia de la perforación.

Yes. Both verbs are in the 1st person plural of the present indicative, so they mean we prorate / we apportion and we leave / we record.

• prorrateamos = we prorate / we apportion
• dejamos = we leave / we put on record / we note

In many business, legal, or administrative contexts, Spanish often uses we in a formal, institutional sense, where English might also use we, we have, or sometimes a passive-style translation such as the balance was apportioned.

Also note that -amos can sometimes be either present or preterite for -ar verbs, but here the context is read as present or formal report-style present.

Prorratear means to prorate, apportion, or distribute proportionally.

So prorrateamos el saldo pendiente means something like:

• we prorate the outstanding balance
• we apportion the remaining balance
• we distribute the pending balance proportionally

This is common in accounting, billing, contracts, and administrative language.

A learner should notice that prorratear is quite technical and formal. In everyday conversation, people might not use it very often unless they are talking about money, invoices, rent, fees, or shared costs.

Saldo usually means balance, especially in financial contexts.

Pendiente here means outstanding, still due, or still pending.

So el saldo pendiente is:

• the outstanding balance
• the remaining amount due
• the unpaid balance

Be careful with pendiente, because in other contexts it can mean other things, for example:

• an earring
• a slope
• pending / unresolved

Here, because it appears with saldo, the financial meaning is the natural one.

The semicolon links two closely related actions without using and.

• Prorrateamos el saldo pendiente; dejamos constancia de la perforación.

This gives a formal, written, report-like tone. It feels a bit like listing two actions taken:

1. We apportioned the outstanding balance
2. We recorded the perforation

In English, this might also be written with a semicolon, a full stop, or and, depending on style. In Spanish, the semicolon often appears in administrative or technical writing to separate related statements clearly.

It is partly literal, but above all it is a set formal expression.

Dejar constancia de algo means:

• to place something on record
• to note officially
• to formally state
• to record that something exists or happened

So dejamos constancia de la perforación means something like:

• we place the perforation on record
• we formally note the perforation
• we record the perforation

This is very common in formal Spanish, especially in:

• legal texts
• reports
• inspections
• official correspondence
• certificates

It sounds much more formal than simply anotamos or indicamos.

Because the standard expression is dejar constancia de + noun / clause.

Examples:

• Dejamos constancia de la incidencia.
• Dejo constancia de que fui informado.
• Se deja constancia de los daños observados.

So:

• de + noun: de la perforación
• de que + clause: de que hubo una perforación

Using que on its own would be incorrect here. Sobre is possible in other contexts, but not in this fixed expression.

Perforación literally means perforation, drilling, piercing, or a hole made by perforating, depending on context.

Its exact meaning depends on the field:

• in engineering or construction: drilling or borehole work
• in a physical inspection: a perforation / puncture / hole
• in medical language: perforation
• in paper or packaging contexts: a perforation

Since the sentence is formal and technical, the best interpretation depends on the wider context. A learner should understand that Spanish uses perforación in several technical domains, just as English does.

Yes, the article la suggests a specific perforation that is already known from the context.

• la perforación = the perforation

In formal Spanish, the definite article is often used where English might also use the, especially when referring to a known event, defect, or item in a report.

If it said una perforación, that would sound more like introducing it for the first time as a perforation rather than referring to an identified one.

Not usually. That would sound unnatural in English in most contexts.

Even though constancia can relate to the idea of proof or record, dejar constancia de is normally better translated as:

• to put on record
• to make note of
• to record
• to formally state

So a more natural English rendering is:

• we record the perforation
• we note the perforation
• we place the perforation on record

Leave evidence would suggest something quite different in English, often in a forensic or criminal sense.

No, it sounds formal, technical, and administrative.

Several things make it formal:

• prorrateamos is technical financial language
• dejamos constancia de is a fixed official expression
• the semicolon gives it a report-like structure
• la perforación sounds like a documented technical fact

In casual speech, speakers would usually choose simpler wording, depending on the situation.

For example, instead of dejamos constancia de, a less formal option might be:

• anotamos la perforación
• indicamos la perforación
• señalamos la perforación

But these are not always exact equivalents; the original sounds more official.

Formally, yes, the form prorrateamos can be either:

• present indicative: we prorate
• preterite: we prorated

This happens with many -ar verbs in the nosotros form.

For example:

• Hoy prorrateamos el saldo = Today we prorate the balance
• Ayer prorrateamos el saldo = Yesterday we prorated the balance

So the context decides.

In your sentence, because it has a formal, report-like tone, it could potentially be understood either way without more context. If the surrounding text describes actions already carried out, then we prorated / we recorded may be the best reading. If it is describing current procedure or the content of a document, the present reading may fit better.

Yes, it is a very common collocation in financial and administrative Spanish.

You will often see combinations such as:

• saldo pendiente
• importe pendiente
• cantidad pendiente
• pago pendiente

They all refer to something still unpaid, unresolved, or due.

So for learners, it is useful to remember saldo pendiente as a natural chunk meaning outstanding balance rather than translating each word separately every time.

Yes, prorratear is used in Spain as well, especially in:

• accounting
• billing
• rental contracts
• utilities
• payroll
• business administration

It is not especially colloquial, but it is standard technical Spanish in Spain. A Spaniard in the right professional context would absolutely understand and use it.

So the word is normal, but the register is specialized rather than everyday conversational.