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Finding the Fourth Proportional to 193,395.56, 290,107.31 and 80,962.70

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Solution

The fourth proportional to 193,395.56, 290,107.31 and 80,962.70 is: 121,449.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,395.56 : 290,107.31 = 80,962.70 : x
  2. Step 2: Convert to fraction form
    193,395.56/290,107.31 = 80,962.70/x
  3. Step 3: Cross multiply
    193,395.56x = 290,107.31 × 80,962.70
  4. Step 4: Simplify right side
    193,395.56x = 23,487,869,251.99
  5. Step 5: Solve for x
    x = 23,487,869,251.99/193,395.56
  6. Step 6: Final answer
    x = 121,449.89

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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.