Finding the Fourth Proportional to 100.92, 151.30 and 68.62
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Solution
The fourth proportional to 100.92, 151.30 and 68.62 is: 102.88
Step by Step Solution
- Step 1: Write the proportion equation
100.92 : 151.30 = 68.62 : x - Step 2: Convert to fraction form
100.92/151.30 = 68.62/x - Step 3: Cross multiply
100.92x = 151.30 × 68.62 - Step 4: Simplify right side
100.92x = 10,382.21 - Step 5: Solve for x
x = 10,382.21/100.92 - Step 6: Final answer
x = 102.88
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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.