Home / 87,821.10-131,731.97-21,261.14

Finding the Fourth Proportional to 87,821.10, 131,731.97 and 21,261.14

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Solution

The fourth proportional to 87,821.10, 131,731.97 and 21,261.14 is: 31,891.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,821.10 : 131,731.97 = 21,261.14 : x
  2. Step 2: Convert to fraction form
    87,821.10/131,731.97 = 21,261.14/x
  3. Step 3: Cross multiply
    87,821.10x = 131,731.97 × 21,261.14
  4. Step 4: Simplify right side
    87,821.10x = 2,800,771,091.68
  5. Step 5: Solve for x
    x = 2,800,771,091.68/87,821.10
  6. Step 6: Final answer
    x = 31,891.78

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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.