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Finding the Fourth Proportional to 87,713.70, 131,571.78 and 28,549.68

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Solution

The fourth proportional to 87,713.70, 131,571.78 and 28,549.68 is: 42,824.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,713.70 : 131,571.78 = 28,549.68 : x
  2. Step 2: Convert to fraction form
    87,713.70/131,571.78 = 28,549.68/x
  3. Step 3: Cross multiply
    87,713.70x = 131,571.78 × 28,549.68
  4. Step 4: Simplify right side
    87,713.70x = 3,756,332,216.03
  5. Step 5: Solve for x
    x = 3,756,332,216.03/87,713.70
  6. Step 6: Final answer
    x = 42,824.92

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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.