Finding the Fourth Proportional to 80,861,415.20, 121,209,454.20 and 39,857,789.60
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Solution
The fourth proportional to 80,861,415.20, 121,209,454.20 and 39,857,789.60 is: 59,745,935.82
Step by Step Solution
- Step 1: Write the proportion equation
80,861,415.20 : 121,209,454.20 = 39,857,789.60 : x - Step 2: Convert to fraction form
80,861,415.20/121,209,454.20 = 39,857,789.60/x - Step 3: Cross multiply
80,861,415.20x = 121,209,454.20 × 39,857,789.60 - Step 4: Simplify right side
80,861,415.20x = 4,831,140,923,034,437 - Step 5: Solve for x
x = 4,831,140,923,034,437/80,861,415.20 - Step 6: Final answer
x = 59,745,935.82
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.