Finding the Fourth Proportional to 431,136,743.40, 646,705,115.10 and 124,438,861.80
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Solution
The fourth proportional to 431,136,743.40, 646,705,115.10 and 124,438,861.80 is: 186,658,292.70
Step by Step Solution
- Step 1: Write the proportion equation
431,136,743.40 : 646,705,115.10 = 124,438,861.80 : x - Step 2: Convert to fraction form
431,136,743.40/646,705,115.10 = 124,438,861.80/x - Step 3: Cross multiply
431,136,743.40x = 646,705,115.10 × 124,438,861.80 - Step 4: Simplify right side
431,136,743.40x = 80,475,248,443,282,000 - Step 5: Solve for x
x = 80,475,248,443,282,000/431,136,743.40 - Step 6: Final answer
x = 186,658,292.70
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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.