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Finding the Fourth Proportional to 129,755.39, 194,563.72 and 66,549.73

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Solution

The fourth proportional to 129,755.39, 194,563.72 and 66,549.73 is: 99,789.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,755.39 : 194,563.72 = 66,549.73 : x
  2. Step 2: Convert to fraction form
    129,755.39/194,563.72 = 66,549.73/x
  3. Step 3: Cross multiply
    129,755.39x = 194,563.72 × 66,549.73
  4. Step 4: Simplify right side
    129,755.39x = 12,948,162,448.17
  5. Step 5: Solve for x
    x = 12,948,162,448.17/129,755.39
  6. Step 6: Final answer
    x = 99,789.01

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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.