Finding the Fourth Proportional to 87,765.12, 121,115.70 and 47,478.92
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Solution
The fourth proportional to 87,765.12, 121,115.70 and 47,478.92 is: 65,520.81
Step by Step Solution
- Step 1: Write the proportion equation
87,765.12 : 121,115.70 = 47,478.92 : x - Step 2: Convert to fraction form
87,765.12/121,115.70 = 47,478.92/x - Step 3: Cross multiply
87,765.12x = 121,115.70 × 47,478.92 - Step 4: Simplify right side
87,765.12x = 5,750,442,025.47 - Step 5: Solve for x
x = 5,750,442,025.47/87,765.12 - Step 6: Final answer
x = 65,520.81
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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.