Home / 135,609.28-187,149.92-78,258.88

Finding the Fourth Proportional to 135,609.28, 187,149.92 and 78,258.88

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Solution

The fourth proportional to 135,609.28, 187,149.92 and 78,258.88 is: 108,002.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,609.28 : 187,149.92 = 78,258.88 : x
  2. Step 2: Convert to fraction form
    135,609.28/187,149.92 = 78,258.88/x
  3. Step 3: Cross multiply
    135,609.28x = 187,149.92 × 78,258.88
  4. Step 4: Simplify right side
    135,609.28x = 14,646,143,131.29
  5. Step 5: Solve for x
    x = 14,646,143,131.29/135,609.28
  6. Step 6: Final answer
    x = 108,002.51

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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.