Home / 87,986.60-131,979.90-72,626.60

Finding the Fourth Proportional to 87,986.60, 131,979.90 and 72,626.60

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Solution

The fourth proportional to 87,986.60, 131,979.90 and 72,626.60 is: 108,939.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,986.60 : 131,979.90 = 72,626.60 : x
  2. Step 2: Convert to fraction form
    87,986.60/131,979.90 = 72,626.60/x
  3. Step 3: Cross multiply
    87,986.60x = 131,979.90 × 72,626.60
  4. Step 4: Simplify right side
    87,986.60x = 9,585,251,405.34
  5. Step 5: Solve for x
    x = 9,585,251,405.34/87,986.60
  6. Step 6: Final answer
    x = 108,939.90

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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.