Home / 87,431.20-131,179.20-28,268.80

Finding the Fourth Proportional to 87,431.20, 131,179.20 and 28,268.80

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Solution

The fourth proportional to 87,431.20, 131,179.20 and 28,268.80 is: 42,413.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,431.20 : 131,179.20 = 28,268.80 : x
  2. Step 2: Convert to fraction form
    87,431.20/131,179.20 = 28,268.80/x
  3. Step 3: Cross multiply
    87,431.20x = 131,179.20 × 28,268.80
  4. Step 4: Simplify right side
    87,431.20x = 3,708,278,568.96
  5. Step 5: Solve for x
    x = 3,708,278,568.96/87,431.20
  6. Step 6: Final answer
    x = 42,413.68

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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.