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Finding the Fourth Proportional to 266,371.02, 399,753.09 and 126,129.42

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Solution

The fourth proportional to 266,371.02, 399,753.09 and 126,129.42 is: 189,287.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,371.02 : 399,753.09 = 126,129.42 : x
  2. Step 2: Convert to fraction form
    266,371.02/399,753.09 = 126,129.42/x
  3. Step 3: Cross multiply
    266,371.02x = 399,753.09 × 126,129.42
  4. Step 4: Simplify right side
    266,371.02x = 50,420,625,384.91
  5. Step 5: Solve for x
    x = 50,420,625,384.91/266,371.02
  6. Step 6: Final answer
    x = 189,287.20

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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.