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Finding the Fourth Proportional to 193,691.60, 290,640.60 and 75,366.80

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Solution

The fourth proportional to 193,691.60, 290,640.60 and 75,366.80 is: 113,090.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,691.60 : 290,640.60 = 75,366.80 : x
  2. Step 2: Convert to fraction form
    193,691.60/290,640.60 = 75,366.80/x
  3. Step 3: Cross multiply
    193,691.60x = 290,640.60 × 75,366.80
  4. Step 4: Simplify right side
    193,691.60x = 21,904,651,972.08
  5. Step 5: Solve for x
    x = 21,904,651,972.08/193,691.60
  6. Step 6: Final answer
    x = 113,090.36

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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.