Finding the Fourth Proportional to 89.97, 134.92 and 72.01
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Solution
The fourth proportional to 89.97, 134.92 and 72.01 is: 107.99
Step by Step Solution
- Step 1: Write the proportion equation
89.97 : 134.92 = 72.01 : x - Step 2: Convert to fraction form
89.97/134.92 = 72.01/x - Step 3: Cross multiply
89.97x = 134.92 × 72.01 - Step 4: Simplify right side
89.97x = 9,715.59 - Step 5: Solve for x
x = 9,715.59/89.97 - Step 6: Final answer
x = 107.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.