Question
If the third proportion of 36 and 54 is “0.5k”, then
find the value of (k − 28) : (k + 20).Solution
Third proportion of two numbers ‘a’ and ‘b’ is (b²/a).
So, 0.5k = (54²/36) = 81
Or, 'k' = 162
Required value = (162 - 28) : (162 + 20) = 134 : 182 = 67 : 91
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