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Finding the Fourth Proportional to 279,253.11, 418,737.51 and 137,109.05

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Solution

The fourth proportional to 279,253.11, 418,737.51 and 137,109.05 is: 205,593.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,253.11 : 418,737.51 = 137,109.05 : x
  2. Step 2: Convert to fraction form
    279,253.11/418,737.51 = 137,109.05/x
  3. Step 3: Cross multiply
    279,253.11x = 418,737.51 × 137,109.05
  4. Step 4: Simplify right side
    279,253.11x = 57,412,702,195.47
  5. Step 5: Solve for x
    x = 57,412,702,195.47/279,253.11
  6. Step 6: Final answer
    x = 205,593.78

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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.