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Finding the Fourth Proportional to 279,791.55, 419,358.56 and 129,715.97

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Solution

The fourth proportional to 279,791.55, 419,358.56 and 129,715.97 is: 194,421.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,791.55 : 419,358.56 = 129,715.97 : x
  2. Step 2: Convert to fraction form
    279,791.55/419,358.56 = 129,715.97/x
  3. Step 3: Cross multiply
    279,791.55x = 419,358.56 × 129,715.97
  4. Step 4: Simplify right side
    279,791.55x = 54,397,499,642.83
  5. Step 5: Solve for x
    x = 54,397,499,642.83/279,791.55
  6. Step 6: Final answer
    x = 194,421.52

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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.