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Finding the Fourth Proportional to 87,368.90, 131,020.13 and 28,195.70

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Solution

The fourth proportional to 87,368.90, 131,020.13 and 28,195.70 is: 42,282.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,368.90 : 131,020.13 = 28,195.70 : x
  2. Step 2: Convert to fraction form
    87,368.90/131,020.13 = 28,195.70/x
  3. Step 3: Cross multiply
    87,368.90x = 131,020.13 × 28,195.70
  4. Step 4: Simplify right side
    87,368.90x = 3,694,203,694.83
  5. Step 5: Solve for x
    x = 3,694,203,694.83/87,368.90
  6. Step 6: Final answer
    x = 42,282.82

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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.