excel - select the row with number most close to certain value -

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i have set of data 3 column (example shown in figure). second column (height) starting 1 , increased ~80 , starting 1 again. need select row second column close 50. shown in figure below, need select 3 rows. can 1 suggest how find out rows in excel?

many thanks!

enter image description here

=match(50, b1:b80, 1)

will find element has largest value less or equal 50 in range (choose ranges accordingly). believe b1:b80 must in ascending order.


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