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Finding the Fourth Proportional to 129,853.80, 194,634.90 and 54,961.20

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Solution

The fourth proportional to 129,853.80, 194,634.90 and 54,961.20 is: 82,380.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,853.80 : 194,634.90 = 54,961.20 : x
  2. Step 2: Convert to fraction form
    129,853.80/194,634.90 = 54,961.20/x
  3. Step 3: Cross multiply
    129,853.80x = 194,634.90 × 54,961.20
  4. Step 4: Simplify right side
    129,853.80x = 10,697,367,665.88
  5. Step 5: Solve for x
    x = 10,697,367,665.88/129,853.80
  6. Step 6: Final answer
    x = 82,380.09

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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.