Home / 87,805.85-131,709.11-21,245.87

Finding the Fourth Proportional to 87,805.85, 131,709.11 and 21,245.87

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Solution

The fourth proportional to 87,805.85, 131,709.11 and 21,245.87 is: 31,868.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,805.85 : 131,709.11 = 21,245.87 : x
  2. Step 2: Convert to fraction form
    87,805.85/131,709.11 = 21,245.87/x
  3. Step 3: Cross multiply
    87,805.85x = 131,709.11 × 21,245.87
  4. Step 4: Simplify right side
    87,805.85x = 2,798,274,851.92
  5. Step 5: Solve for x
    x = 2,798,274,851.92/87,805.85
  6. Step 6: Final answer
    x = 31,868.89

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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.