Home / 87,821.70-131,732.88-21,261.72

Finding the Fourth Proportional to 87,821.70, 131,732.88 and 21,261.72

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Solution

The fourth proportional to 87,821.70, 131,732.88 and 21,261.72 is: 31,892.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,821.70 : 131,732.88 = 21,261.72 : x
  2. Step 2: Convert to fraction form
    87,821.70/131,732.88 = 21,261.72/x
  3. Step 3: Cross multiply
    87,821.70x = 131,732.88 × 21,261.72
  4. Step 4: Simplify right side
    87,821.70x = 2,800,867,609.35
  5. Step 5: Solve for x
    x = 2,800,867,609.35/87,821.70
  6. Step 6: Final answer
    x = 31,892.66

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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.