Home / 87,861.11-131,698.71-28,680.89

Finding the Fourth Proportional to 87,861.11, 131,698.71 and 28,680.89

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Solution

The fourth proportional to 87,861.11, 131,698.71 and 28,680.89 is: 42,990.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,861.11 : 131,698.71 = 28,680.89 : x
  2. Step 2: Convert to fraction form
    87,861.11/131,698.71 = 28,680.89/x
  3. Step 3: Cross multiply
    87,861.11x = 131,698.71 × 28,680.89
  4. Step 4: Simplify right side
    87,861.11x = 3,777,235,556.16
  5. Step 5: Solve for x
    x = 3,777,235,556.16/87,861.11
  6. Step 6: Final answer
    x = 42,990.99

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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.