Finding the Fourth Proportional to 138,399,154.70, 207,457,014.45 and 80,861,809.10
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Solution
The fourth proportional to 138,399,154.70, 207,457,014.45 and 80,861,809.10 is: 121,209,912.99
Step by Step Solution
- Step 1: Write the proportion equation
138,399,154.70 : 207,457,014.45 = 80,861,809.10 : x - Step 2: Convert to fraction form
138,399,154.70/207,457,014.45 = 80,861,809.10/x - Step 3: Cross multiply
138,399,154.70x = 207,457,014.45 × 80,861,809.10 - Step 4: Simplify right side
138,399,154.70x = 16,775,349,498,911,840 - Step 5: Solve for x
x = 16,775,349,498,911,840/138,399,154.70 - Step 6: Final answer
x = 121,209,912.99
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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.