Finding the Fourth Proportional to 87,931.92, 121,346.20 and 47,645.68
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Solution
The fourth proportional to 87,931.92, 121,346.20 and 47,645.68 is: 65,751.12
Step by Step Solution
- Step 1: Write the proportion equation
87,931.92 : 121,346.20 = 47,645.68 : x - Step 2: Convert to fraction form
87,931.92/121,346.20 = 47,645.68/x - Step 3: Cross multiply
87,931.92x = 121,346.20 × 47,645.68 - Step 4: Simplify right side
87,931.92x = 5,781,622,214.42 - Step 5: Solve for x
x = 5,781,622,214.42/87,931.92 - Step 6: Final answer
x = 65,751.12
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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.