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Finding the Fourth Proportional to 87,856.70, 131,805.90 and 28,692.27

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Solution

The fourth proportional to 87,856.70, 131,805.90 and 28,692.27 is: 43,045.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,856.70 : 131,805.90 = 28,692.27 : x
  2. Step 2: Convert to fraction form
    87,856.70/131,805.90 = 28,692.27/x
  3. Step 3: Cross multiply
    87,856.70x = 131,805.90 × 28,692.27
  4. Step 4: Simplify right side
    87,856.70x = 3,781,810,470.39
  5. Step 5: Solve for x
    x = 3,781,810,470.39/87,856.70
  6. Step 6: Final answer
    x = 43,045.22

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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.