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Finding the Fourth Proportional to 139,253.78, 192,170.46 and 75,591.62

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Solution

The fourth proportional to 139,253.78, 192,170.46 and 75,591.62 is: 104,316.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,253.78 : 192,170.46 = 75,591.62 : x
  2. Step 2: Convert to fraction form
    139,253.78/192,170.46 = 75,591.62/x
  3. Step 3: Cross multiply
    139,253.78x = 192,170.46 × 75,591.62
  4. Step 4: Simplify right side
    139,253.78x = 14,526,476,387.55
  5. Step 5: Solve for x
    x = 14,526,476,387.55/139,253.78
  6. Step 6: Final answer
    x = 104,316.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.