Home / 87,880.32-131,819.22-21,321

Finding the Fourth Proportional to 87,880.32, 131,819.22 and 21,321

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Solution

The fourth proportional to 87,880.32, 131,819.22 and 21,321 is: 31,981.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,880.32 : 131,819.22 = 21,321 : x
  2. Step 2: Convert to fraction form
    87,880.32/131,819.22 = 21,321/x
  3. Step 3: Cross multiply
    87,880.32x = 131,819.22 × 21,321
  4. Step 4: Simplify right side
    87,880.32x = 2,810,517,589.62
  5. Step 5: Solve for x
    x = 2,810,517,589.62/87,880.32
  6. Step 6: Final answer
    x = 31,981.19

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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.