Formula to find number

Francisco77 

To find the date on which the accumulated sum of values reaches 100 or the value closest to 100, you can use a formula in Excel. You can use the following formula to achieve this:

Assuming your dates are in column A and the values are in column B, and you want to start counting from cell C1 (you can change this reference based on your needs), enter this array formula in a cell:

=INDEX(A1:A40,MATCH(TRUE,SUMIF(OFFSET($B$1,0,0,ROW(B1:B40)-MIN(ROW(B1:B40)),1),">="&100)>=100,0),0)

This formula finds the date closest to or exactly reaching the accumulated sum of 100 by checking the cumulative sum of values.

For your example data, it should return "05-11-23" as the result since the accumulated sum at that date is the closest to 100 (which is 100.1). The text was created with the help of AI.

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Hope this will help you.

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Francisco77 

I recommend tabling the source data to set yourself up with dynamic items and then do some accumulation:

=LET(
    discard, XMATCH(DateInput, Table1[Date]) - 1,
    Values, DROP(Table1[Value], discard),
    Dates, DROP(Table1[Date], discard),
    Accumulate, LAMBDA(a, v, a + v),
    AccArray, SCAN(0, Values, Accumulate),
    XLOOKUP(100, AccArray, Dates, "", -1)
)