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Finding the Fourth Proportional to 86,591.40, 129,772.27 and 44,469.78

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Solution

The fourth proportional to 86,591.40, 129,772.27 and 44,469.78 is: 66,645.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,591.40 : 129,772.27 = 44,469.78 : x
  2. Step 2: Convert to fraction form
    86,591.40/129,772.27 = 44,469.78/x
  3. Step 3: Cross multiply
    86,591.40x = 129,772.27 × 44,469.78
  4. Step 4: Simplify right side
    86,591.40x = 5,770,944,297.00
  5. Step 5: Solve for x
    x = 5,770,944,297.00/86,591.40
  6. Step 6: Final answer
    x = 66,645.70

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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.