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Finding the Fourth Proportional to 279,578.62, 418,737.03 and 129,503.62

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Solution

The fourth proportional to 279,578.62, 418,737.03 and 129,503.62 is: 193,963.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,578.62 : 418,737.03 = 129,503.62 : x
  2. Step 2: Convert to fraction form
    279,578.62/418,737.03 = 129,503.62/x
  3. Step 3: Cross multiply
    279,578.62x = 418,737.03 × 129,503.62
  4. Step 4: Simplify right side
    279,578.62x = 54,227,961,213.05
  5. Step 5: Solve for x
    x = 54,227,961,213.05/279,578.62
  6. Step 6: Final answer
    x = 193,963.19

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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.