Home / 87,865.76-131,799.09-21,305.90

Finding the Fourth Proportional to 87,865.76, 131,799.09 and 21,305.90

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Solution

The fourth proportional to 87,865.76, 131,799.09 and 21,305.90 is: 31,958.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,865.76 : 131,799.09 = 21,305.90 : x
  2. Step 2: Convert to fraction form
    87,865.76/131,799.09 = 21,305.90/x
  3. Step 3: Cross multiply
    87,865.76x = 131,799.09 × 21,305.90
  4. Step 4: Simplify right side
    87,865.76x = 2,808,097,572.64
  5. Step 5: Solve for x
    x = 2,808,097,572.64/87,865.76
  6. Step 6: Final answer
    x = 31,958.95

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1.5x scale

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.