Home / 87,870.40-131,815.20-85,105.60

Finding the Fourth Proportional to 87,870.40, 131,815.20 and 85,105.60

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Solution

The fourth proportional to 87,870.40, 131,815.20 and 85,105.60 is: 127,667.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,870.40 : 131,815.20 = 85,105.60 : x
  2. Step 2: Convert to fraction form
    87,870.40/131,815.20 = 85,105.60/x
  3. Step 3: Cross multiply
    87,870.40x = 131,815.20 × 85,105.60
  4. Step 4: Simplify right side
    87,870.40x = 11,218,211,685.12
  5. Step 5: Solve for x
    x = 11,218,211,685.12/87,870.40
  6. Step 6: Final answer
    x = 127,667.70

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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.