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Finding the Fourth Proportional to 87,998.60, 131,949.30 and 28,803.80

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Solution

The fourth proportional to 87,998.60, 131,949.30 and 28,803.80 is: 43,189.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,998.60 : 131,949.30 = 28,803.80 : x
  2. Step 2: Convert to fraction form
    87,998.60/131,949.30 = 28,803.80/x
  3. Step 3: Cross multiply
    87,998.60x = 131,949.30 × 28,803.80
  4. Step 4: Simplify right side
    87,998.60x = 3,800,641,247.34
  5. Step 5: Solve for x
    x = 3,800,641,247.34/87,998.60
  6. Step 6: Final answer
    x = 43,189.79

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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.