I really hope someone can please help me...

I have a spreadsheet with 119 separate worksheets (Site 1 - Site 119) and
one "master" worksheet. The "master" worksheet is basically the combination
of specific data from each of the 119 sheets, so it has 119 rows (and about
45 columns). In the master, I have a formula that refers to the separate
external worksheets (ie, each row in the "Master" (rows 1-119) will refer to
sheet 1 - sheet 119. To save myself hours of copying the same forumla and
changing the sheet number, I am trying to drag down the formula to keep the
same cell number, but change the referenced sheet number...

SO, the formula in the master in row 1 is:

='Site 1'!$BL$116

I want to drag it down so the external worksheet number changes, but the
cell doesn't, so row 2 will be:

='Site 2'!$BL$116

and row 3 will be:

='Site 3'!$BL$116

all the way to row 119 which will be:

='Site 119'!$BL$116

But when I drag, it just drags 'Site 1'! all the way down.

Can anyone help me? Is this even possible or do I have to type in the
number 119 times (multiplied by about 45 columns I have to do this to).

Thanks!