Finding the Fourth Proportional to 100,639.92, 138,885.68 and 58,201.12
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Solution
The fourth proportional to 100,639.92, 138,885.68 and 58,201.12 is: 80,319.04
Step by Step Solution
- Step 1: Write the proportion equation
100,639.92 : 138,885.68 = 58,201.12 : x - Step 2: Convert to fraction form
100,639.92/138,885.68 = 58,201.12/x - Step 3: Cross multiply
100,639.92x = 138,885.68 × 58,201.12 - Step 4: Simplify right side
100,639.92x = 8,083,302,127.96 - Step 5: Solve for x
x = 8,083,302,127.96/100,639.92 - Step 6: Final answer
x = 80,319.04
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1.5x scale
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.