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Finding the Fourth Proportional to 139,659.78, 192,734.86 and 79,232.97

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Solution

The fourth proportional to 139,659.78, 192,734.86 and 79,232.97 is: 109,343.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,659.78 : 192,734.86 = 79,232.97 : x
  2. Step 2: Convert to fraction form
    139,659.78/192,734.86 = 79,232.97/x
  3. Step 3: Cross multiply
    139,659.78x = 192,734.86 × 79,232.97
  4. Step 4: Simplify right side
    139,659.78x = 15,270,955,380.33
  5. Step 5: Solve for x
    x = 15,270,955,380.33/139,659.78
  6. Step 6: Final answer
    x = 109,343.97

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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.