Linking ProProgram with Excelsheet

Hello everyone! For every part model there is a Pro/Program file(having .pls extension). I wish to connect an excelsheet with Pro/Program file. I just want to know whether the relations between various parameters of the model defined within the excelsheet can be incorporated directly into the Pro/Program. For example length of shaft is thrice the diameter. If this relation is defined in excelsheet using a equation, then is it possible to transfer this equation directly into Pro/Program?

Regards, 

Rohan.