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Finding the Fourth Proportional to 87,843.40, 131,774.70 and 85,078.60

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Solution

The fourth proportional to 87,843.40, 131,774.70 and 85,078.60 is: 127,627.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,843.40 : 131,774.70 = 85,078.60 : x
  2. Step 2: Convert to fraction form
    87,843.40/131,774.70 = 85,078.60/x
  3. Step 3: Cross multiply
    87,843.40x = 131,774.70 × 85,078.60
  4. Step 4: Simplify right side
    87,843.40x = 11,211,206,991.42
  5. Step 5: Solve for x
    x = 11,211,206,991.42/87,843.40
  6. Step 6: Final answer
    x = 127,627.20

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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.