I need to know how to do the following.

I have an empty cell next to a cell with a value.
I want to take that cell with a value and compare it to the values found in
a column contained in another worksheet. That column would have a companion
cell that contains a value.
When a match is found I want the original empty cell to contain the value of
the companion cell next to the column were the matching value was found.

So if my original value was 8, I find 8 in a cell in the column, the
companion cell value was 88, then my original empty cell would get a value of
88.

I hope I explained that clearly enough.