Finding the Fourth Proportional to 87,856,915.20, 121,201,534.08 and 55,279,829.76
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Solution
The fourth proportional to 87,856,915.20, 121,201,534.08 and 55,279,829.76 is: 76,260,362.15
Step by Step Solution
- Step 1: Write the proportion equation
87,856,915.20 : 121,201,534.08 = 55,279,829.76 : x - Step 2: Convert to fraction form
87,856,915.20/121,201,534.08 = 55,279,829.76/x - Step 3: Cross multiply
87,856,915.20x = 121,201,534.08 × 55,279,829.76 - Step 4: Simplify right side
87,856,915.20x = 6,700,000,170,593,238 - Step 5: Solve for x
x = 6,700,000,170,593,238/87,856,915.20 - Step 6: Final answer
x = 76,260,362.15
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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.