Home / 87,515.60-131,431.80-76,629.20

Finding the Fourth Proportional to 87,515.60, 131,431.80 and 76,629.20

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Solution

The fourth proportional to 87,515.60, 131,431.80 and 76,629.20 is: 115,082.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,515.60 : 131,431.80 = 76,629.20 : x
  2. Step 2: Convert to fraction form
    87,515.60/131,431.80 = 76,629.20/x
  3. Step 3: Cross multiply
    87,515.60x = 131,431.80 × 76,629.20
  4. Step 4: Simplify right side
    87,515.60x = 10,071,513,688.56
  5. Step 5: Solve for x
    x = 10,071,513,688.56/87,515.60
  6. Step 6: Final answer
    x = 115,082.50

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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.