How to repeat duplication with changing values?

Hello all!
First of all - english is not my first language so I don't really know how to explain this in an easy way (and therefore I don't know what to search for either). Maybe a better topic title is needed as well.
I made an illustration to show what I need, I guess it's easier to understand than my explanation below...
QUESTION: I have a circle. I want to make a copy of this circle for, say, 80 % of the original size. I'd like to repeat the duplication so the next copy have the same distance to the second circle as between the first two circles (in other word the percentage would change between tranformations) - and so on.
Hopefully there is some easy way to achieve this so I don't have to do it manually.
Thanks in advance for any advice!
(Btw, I use CS5)

Thank you for your quick reply! This works! I found out another way to do it (sometimes it seems to help with the thinking process just to start a new topic...); the Transition-tool. The downside is that I cannot insert the distance that I wan't to use, so you're advice may be better.
Thanks again!

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I am trying to create a spreadsheet where the result depends on the value of 2 options selected. Option 1 is a list of different TV manufactures. Option 2 will provide a list of model numbers depending on which manufacturer was chosen in option 1 and finally box 3 will show a list of remote control codes depending on what was chosen in option 2.
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