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Finding the Fourth Proportional to 87,675, 131,529.78 and 28,512.12

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Solution

The fourth proportional to 87,675, 131,529.78 and 28,512.12 is: 42,773.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,675 : 131,529.78 = 28,512.12 : x
  2. Step 2: Convert to fraction form
    87,675/131,529.78 = 28,512.12/x
  3. Step 3: Cross multiply
    87,675x = 131,529.78 × 28,512.12
  4. Step 4: Simplify right side
    87,675x = 3,750,192,870.93
  5. Step 5: Solve for x
    x = 3,750,192,870.93/87,675
  6. Step 6: Final answer
    x = 42,773.80

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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.