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Finding the Fourth Proportional to 266,398.20, 399,318.21 and 124,126.17

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Solution

The fourth proportional to 266,398.20, 399,318.21 and 124,126.17 is: 186,059.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,398.20 : 399,318.21 = 124,126.17 : x
  2. Step 2: Convert to fraction form
    266,398.20/399,318.21 = 124,126.17/x
  3. Step 3: Cross multiply
    266,398.20x = 399,318.21 × 124,126.17
  4. Step 4: Simplify right side
    266,398.20x = 49,565,840,018.56
  5. Step 5: Solve for x
    x = 49,565,840,018.56/266,398.20
  6. Step 6: Final answer
    x = 186,059.22

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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.