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Finding the Fourth Proportional to 279,568.68, 418,722.12 and 129,493.73

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Solution

The fourth proportional to 279,568.68, 418,722.12 and 129,493.73 is: 193,948.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,568.68 : 418,722.12 = 129,493.73 : x
  2. Step 2: Convert to fraction form
    279,568.68/418,722.12 = 129,493.73/x
  3. Step 3: Cross multiply
    279,568.68x = 418,722.12 × 129,493.73
  4. Step 4: Simplify right side
    279,568.68x = 54,221,887,058.70
  5. Step 5: Solve for x
    x = 54,221,887,058.70/279,568.68
  6. Step 6: Final answer
    x = 193,948.36

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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.