Finding the Fourth Proportional to 100.17, 138.24 and 93.42
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Solution
The fourth proportional to 100.17, 138.24 and 93.42 is: 128.92
Step by Step Solution
- Step 1: Write the proportion equation
100.17 : 138.24 = 93.42 : x - Step 2: Convert to fraction form
100.17/138.24 = 93.42/x - Step 3: Cross multiply
100.17x = 138.24 × 93.42 - Step 4: Simplify right side
100.17x = 12,914.38 - Step 5: Solve for x
x = 12,914.38/100.17 - Step 6: Final answer
x = 128.92
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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.