Home / 87,981.20-131,970.60-28,818.80

Finding the Fourth Proportional to 87,981.20, 131,970.60 and 28,818.80

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Solution

The fourth proportional to 87,981.20, 131,970.60 and 28,818.80 is: 43,227.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,981.20 : 131,970.60 = 28,818.80 : x
  2. Step 2: Convert to fraction form
    87,981.20/131,970.60 = 28,818.80/x
  3. Step 3: Cross multiply
    87,981.20x = 131,970.60 × 28,818.80
  4. Step 4: Simplify right side
    87,981.20x = 3,803,234,327.28
  5. Step 5: Solve for x
    x = 3,803,234,327.28/87,981.20
  6. Step 6: Final answer
    x = 43,227.81

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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.