Home / 87,419.28-120,635.64-49,179.60

Finding the Fourth Proportional to 87,419.28, 120,635.64 and 49,179.60

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Solution

The fourth proportional to 87,419.28, 120,635.64 and 49,179.60 is: 67,866.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,419.28 : 120,635.64 = 49,179.60 : x
  2. Step 2: Convert to fraction form
    87,419.28/120,635.64 = 49,179.60/x
  3. Step 3: Cross multiply
    87,419.28x = 120,635.64 × 49,179.60
  4. Step 4: Simplify right side
    87,419.28x = 5,932,812,520.94
  5. Step 5: Solve for x
    x = 5,932,812,520.94/87,419.28
  6. Step 6: Final answer
    x = 67,866.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.