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Finding the Fourth Proportional to 126,462.89, 189,638.18 and 67,286.09

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Solution

The fourth proportional to 126,462.89, 189,638.18 and 67,286.09 is: 100,899.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,462.89 : 189,638.18 = 67,286.09 : x
  2. Step 2: Convert to fraction form
    126,462.89/189,638.18 = 67,286.09/x
  3. Step 3: Cross multiply
    126,462.89x = 189,638.18 × 67,286.09
  4. Step 4: Simplify right side
    126,462.89x = 12,760,011,310.49
  5. Step 5: Solve for x
    x = 12,760,011,310.49/126,462.89
  6. Step 6: Final answer
    x = 100,899.25

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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.