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Finding the Fourth Proportional to 279,404, 418,814.25 and 129,520.70

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Solution

The fourth proportional to 279,404, 418,814.25 and 129,520.70 is: 194,145.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,404 : 418,814.25 = 129,520.70 : x
  2. Step 2: Convert to fraction form
    279,404/418,814.25 = 129,520.70/x
  3. Step 3: Cross multiply
    279,404x = 418,814.25 × 129,520.70
  4. Step 4: Simplify right side
    279,404x = 54,245,114,829.98
  5. Step 5: Solve for x
    x = 54,245,114,829.98/279,404
  6. Step 6: Final answer
    x = 194,145.81

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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.