Home / 87,981.60-131,972.40-82,912.80

Finding the Fourth Proportional to 87,981.60, 131,972.40 and 82,912.80

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Solution

The fourth proportional to 87,981.60, 131,972.40 and 82,912.80 is: 124,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,981.60 : 131,972.40 = 82,912.80 : x
  2. Step 2: Convert to fraction form
    87,981.60/131,972.40 = 82,912.80/x
  3. Step 3: Cross multiply
    87,981.60x = 131,972.40 × 82,912.80
  4. Step 4: Simplify right side
    87,981.60x = 10,942,201,206.72
  5. Step 5: Solve for x
    x = 10,942,201,206.72/87,981.60
  6. Step 6: Final answer
    x = 124,369.20

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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.