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Finding the Fourth Proportional to 266,704.20, 399,972.84 and 89,169.78

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Solution

The fourth proportional to 266,704.20, 399,972.84 and 89,169.78 is: 133,726.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,704.20 : 399,972.84 = 89,169.78 : x
  2. Step 2: Convert to fraction form
    266,704.20/399,972.84 = 89,169.78/x
  3. Step 3: Cross multiply
    266,704.20x = 399,972.84 × 89,169.78
  4. Step 4: Simplify right side
    266,704.20x = 35,665,490,148.78
  5. Step 5: Solve for x
    x = 35,665,490,148.78/266,704.20
  6. Step 6: Final answer
    x = 133,726.77

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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.