Finding the Fourth Proportional to 81,664,672.80, 122,497,009.20 and 51,431,584.80
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Solution
The fourth proportional to 81,664,672.80, 122,497,009.20 and 51,431,584.80 is: 77,147,377.20
Step by Step Solution
- Step 1: Write the proportion equation
81,664,672.80 : 122,497,009.20 = 51,431,584.80 : x - Step 2: Convert to fraction form
81,664,672.80/122,497,009.20 = 51,431,584.80/x - Step 3: Cross multiply
81,664,672.80x = 122,497,009.20 × 51,431,584.80 - Step 4: Simplify right side
81,664,672.80x = 6,300,215,316,416,180 - Step 5: Solve for x
x = 6,300,215,316,416,180/81,664,672.80 - Step 6: Final answer
x = 77,147,377.20
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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.