Finding the Fourth Proportional to 256,645,990.20, 385,063,463.70 and 84,128,431.80
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Solution
The fourth proportional to 256,645,990.20, 385,063,463.70 and 84,128,431.80 is: 126,223,617.67
Step by Step Solution
- Step 1: Write the proportion equation
256,645,990.20 : 385,063,463.70 = 84,128,431.80 : x - Step 2: Convert to fraction form
256,645,990.20/385,063,463.70 = 84,128,431.80/x - Step 3: Cross multiply
256,645,990.20x = 385,063,463.70 × 84,128,431.80 - Step 4: Simplify right side
256,645,990.20x = 32,394,785,344,557,224 - Step 5: Solve for x
x = 32,394,785,344,557,224/256,645,990.20 - Step 6: Final answer
x = 126,223,617.67
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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.