Finding the Fourth Proportional to 72.68, 108.86 and 60.42
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Solution
The fourth proportional to 72.68, 108.86 and 60.42 is: 90.50
Step by Step Solution
- Step 1: Write the proportion equation
72.68 : 108.86 = 60.42 : x - Step 2: Convert to fraction form
72.68/108.86 = 60.42/x - Step 3: Cross multiply
72.68x = 108.86 × 60.42 - Step 4: Simplify right side
72.68x = 6,577.32 - Step 5: Solve for x
x = 6,577.32/72.68 - Step 6: Final answer
x = 90.50
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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.