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Finding the Fourth Proportional to 87,902.80, 131,840.68 and 28,738.80

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Solution

The fourth proportional to 87,902.80, 131,840.68 and 28,738.80 is: 43,103.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,902.80 : 131,840.68 = 28,738.80 : x
  2. Step 2: Convert to fraction form
    87,902.80/131,840.68 = 28,738.80/x
  3. Step 3: Cross multiply
    87,902.80x = 131,840.68 × 28,738.80
  4. Step 4: Simplify right side
    87,902.80x = 3,788,942,934.38
  5. Step 5: Solve for x
    x = 3,788,942,934.38/87,902.80
  6. Step 6: Final answer
    x = 43,103.78

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1.5x scale

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.