Finding the Fourth Proportional to 93.87, 129.36 and 76.32
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Solution
The fourth proportional to 93.87, 129.36 and 76.32 is: 105.17
Step by Step Solution
- Step 1: Write the proportion equation
93.87 : 129.36 = 76.32 : x - Step 2: Convert to fraction form
93.87/129.36 = 76.32/x - Step 3: Cross multiply
93.87x = 129.36 × 76.32 - Step 4: Simplify right side
93.87x = 9,872.76 - Step 5: Solve for x
x = 9,872.76/93.87 - Step 6: Final answer
x = 105.17
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.