Finding the Fourth Proportional to 100.92, 138.35 and 99.08
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Solution
The fourth proportional to 100.92, 138.35 and 99.08 is: 135.82
Step by Step Solution
- Step 1: Write the proportion equation
100.92 : 138.35 = 99.08 : x - Step 2: Convert to fraction form
100.92/138.35 = 99.08/x - Step 3: Cross multiply
100.92x = 138.35 × 99.08 - Step 4: Simplify right side
100.92x = 13,707.22 - Step 5: Solve for x
x = 13,707.22/100.92 - Step 6: Final answer
x = 135.82
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.