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Finding the Fourth Proportional to 129,700.20, 194,550.30 and 81,027.30

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Solution

The fourth proportional to 129,700.20, 194,550.30 and 81,027.30 is: 121,540.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,700.20 : 194,550.30 = 81,027.30 : x
  2. Step 2: Convert to fraction form
    129,700.20/194,550.30 = 81,027.30/x
  3. Step 3: Cross multiply
    129,700.20x = 194,550.30 × 81,027.30
  4. Step 4: Simplify right side
    129,700.20x = 15,763,885,523.19
  5. Step 5: Solve for x
    x = 15,763,885,523.19/129,700.20
  6. Step 6: Final answer
    x = 121,540.95

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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.