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Finding the Fourth Proportional to 87,306.46, 120,479.72 and 53,371.78

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Solution

The fourth proportional to 87,306.46, 120,479.72 and 53,371.78 is: 73,651.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,306.46 : 120,479.72 = 53,371.78 : x
  2. Step 2: Convert to fraction form
    87,306.46/120,479.72 = 53,371.78/x
  3. Step 3: Cross multiply
    87,306.46x = 120,479.72 × 53,371.78
  4. Step 4: Simplify right side
    87,306.46x = 6,430,217,110.30
  5. Step 5: Solve for x
    x = 6,430,217,110.30/87,306.46
  6. Step 6: Final answer
    x = 73,651.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.