Finding the Fourth Proportional to 138,399,144.70, 207,456,999.45 and 80,861,799.10
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Solution
The fourth proportional to 138,399,144.70, 207,456,999.45 and 80,861,799.10 is: 121,209,897.99
Step by Step Solution
- Step 1: Write the proportion equation
138,399,144.70 : 207,456,999.45 = 80,861,799.10 : x - Step 2: Convert to fraction form
138,399,144.70/207,456,999.45 = 80,861,799.10/x - Step 3: Cross multiply
138,399,144.70x = 207,456,999.45 × 80,861,799.10 - Step 4: Simplify right side
138,399,144.70x = 16,775,346,211,414,708 - Step 5: Solve for x
x = 16,775,346,211,414,708/138,399,144.70 - Step 6: Final answer
x = 121,209,897.99
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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.