Finding the Fourth Proportional to 90.09, 134.42 and 74.97
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Solution
The fourth proportional to 90.09, 134.42 and 74.97 is: 111.86
Step by Step Solution
- Step 1: Write the proportion equation
90.09 : 134.42 = 74.97 : x - Step 2: Convert to fraction form
90.09/134.42 = 74.97/x - Step 3: Cross multiply
90.09x = 134.42 × 74.97 - Step 4: Simplify right side
90.09x = 10,077.09 - Step 5: Solve for x
x = 10,077.09/90.09 - Step 6: Final answer
x = 111.86
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.