Finding the Fourth Proportional to 80,861,405.70, 121,209,439.95 and 39,857,780.10
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Solution
The fourth proportional to 80,861,405.70, 121,209,439.95 and 39,857,780.10 is: 59,745,921.58
Step by Step Solution
- Step 1: Write the proportion equation
80,861,405.70 : 121,209,439.95 = 39,857,780.10 : x - Step 2: Convert to fraction form
80,861,405.70/121,209,439.95 = 39,857,780.10/x - Step 3: Cross multiply
80,861,405.70x = 121,209,439.95 × 39,857,780.10 - Step 4: Simplify right side
80,861,405.70x = 4,831,139,203,571,255 - Step 5: Solve for x
x = 4,831,139,203,571,255/80,861,405.70 - Step 6: Final answer
x = 59,745,921.58
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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.