Finding the Fourth Proportional to 71.76, 108.07 and 60.42
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Solution
The fourth proportional to 71.76, 108.07 and 60.42 is: 90.99
Step by Step Solution
- Step 1: Write the proportion equation
71.76 : 108.07 = 60.42 : x - Step 2: Convert to fraction form
71.76/108.07 = 60.42/x - Step 3: Cross multiply
71.76x = 108.07 × 60.42 - Step 4: Simplify right side
71.76x = 6,529.29 - Step 5: Solve for x
x = 6,529.29/71.76 - Step 6: Final answer
x = 90.99
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.