Home / 87,881.16-131,821.26-21,321.30

Finding the Fourth Proportional to 87,881.16, 131,821.26 and 21,321.30

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Solution

The fourth proportional to 87,881.16, 131,821.26 and 21,321.30 is: 31,981.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,881.16 : 131,821.26 = 21,321.30 : x
  2. Step 2: Convert to fraction form
    87,881.16/131,821.26 = 21,321.30/x
  3. Step 3: Cross multiply
    87,881.16x = 131,821.26 × 21,321.30
  4. Step 4: Simplify right side
    87,881.16x = 2,810,600,630.84
  5. Step 5: Solve for x
    x = 2,810,600,630.84/87,881.16
  6. Step 6: Final answer
    x = 31,981.83

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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.