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Finding the Fourth Proportional to 126,576.72, 189,893.88 and 67,381.20

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Solution

The fourth proportional to 126,576.72, 189,893.88 and 67,381.20 is: 101,087.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,576.72 : 189,893.88 = 67,381.20 : x
  2. Step 2: Convert to fraction form
    126,576.72/189,893.88 = 67,381.20/x
  3. Step 3: Cross multiply
    126,576.72x = 189,893.88 × 67,381.20
  4. Step 4: Simplify right side
    126,576.72x = 12,795,277,507.06
  5. Step 5: Solve for x
    x = 12,795,277,507.06/126,576.72
  6. Step 6: Final answer
    x = 101,087.13

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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.