Home / 87,939.78-131,909.06-21,380.34

Finding the Fourth Proportional to 87,939.78, 131,909.06 and 21,380.34

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Solution

The fourth proportional to 87,939.78, 131,909.06 and 21,380.34 is: 32,070.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,939.78 : 131,909.06 = 21,380.34 : x
  2. Step 2: Convert to fraction form
    87,939.78/131,909.06 = 21,380.34/x
  3. Step 3: Cross multiply
    87,939.78x = 131,909.06 × 21,380.34
  4. Step 4: Simplify right side
    87,939.78x = 2,820,260,551.88
  5. Step 5: Solve for x
    x = 2,820,260,551.88/87,939.78
  6. Step 6: Final answer
    x = 32,070.36

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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.