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Finding the Fourth Proportional to 87,631.80, 131,447.70 and 82,447.80

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Solution

The fourth proportional to 87,631.80, 131,447.70 and 82,447.80 is: 123,671.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,631.80 : 131,447.70 = 82,447.80 : x
  2. Step 2: Convert to fraction form
    87,631.80/131,447.70 = 82,447.80/x
  3. Step 3: Cross multiply
    87,631.80x = 131,447.70 × 82,447.80
  4. Step 4: Simplify right side
    87,631.80x = 10,837,573,680.06
  5. Step 5: Solve for x
    x = 10,837,573,680.06/87,631.80
  6. Step 6: Final answer
    x = 123,671.70

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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.