Hi,
Please clarify what does interpolated values mean?
OR
Please explain Your question in more detail.
Please check whether the following solution is helpful:

Formula in cell B5 is: =VLOOKUP($A5,$A$9:$I$22,COLUMN(),TRUE)
NOTE
1. In the above suggested formula, please change cell reference/ranges to suit Your requirement.
2. Please drag the formula right to more columns.
e.g.1) In cell A5 > if You write 75 > the formula above will return values for row#11 i.e. for Sounding 60.
e.g.2) In cell A5 > if You write 165 > the formula above will return values for row#16 i.e. for Sounding 160.
Please respond if You require further assistance. I will try My best to be of help.
If I was able to help You, please mark My response as answer and helpful.
Thank You!