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Finding the Fourth Proportional to 129,430.78, 194,202.72 and 45,251.39

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Solution

The fourth proportional to 129,430.78, 194,202.72 and 45,251.39 is: 67,896.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,430.78 : 194,202.72 = 45,251.39 : x
  2. Step 2: Convert to fraction form
    129,430.78/194,202.72 = 45,251.39/x
  3. Step 3: Cross multiply
    129,430.78x = 194,202.72 × 45,251.39
  4. Step 4: Simplify right side
    129,430.78x = 8,787,943,507.29
  5. Step 5: Solve for x
    x = 8,787,943,507.29/129,430.78
  6. Step 6: Final answer
    x = 67,896.86

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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.