Home / 87,868.40-131,812.20-85,103.60

Finding the Fourth Proportional to 87,868.40, 131,812.20 and 85,103.60

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Solution

The fourth proportional to 87,868.40, 131,812.20 and 85,103.60 is: 127,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,868.40 : 131,812.20 = 85,103.60 : x
  2. Step 2: Convert to fraction form
    87,868.40/131,812.20 = 85,103.60/x
  3. Step 3: Cross multiply
    87,868.40x = 131,812.20 × 85,103.60
  4. Step 4: Simplify right side
    87,868.40x = 11,217,692,743.92
  5. Step 5: Solve for x
    x = 11,217,692,743.92/87,868.40
  6. Step 6: Final answer
    x = 127,664.70

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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.