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Finding the Fourth Proportional to 129,581.74, 194,120.42 and 73,251.45

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Solution

The fourth proportional to 129,581.74, 194,120.42 and 73,251.45 is: 109,734.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,581.74 : 194,120.42 = 73,251.45 : x
  2. Step 2: Convert to fraction form
    129,581.74/194,120.42 = 73,251.45/x
  3. Step 3: Cross multiply
    129,581.74x = 194,120.42 × 73,251.45
  4. Step 4: Simplify right side
    129,581.74x = 14,219,602,239.61
  5. Step 5: Solve for x
    x = 14,219,602,239.61/129,581.74
  6. Step 6: Final answer
    x = 109,734.61

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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.