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Finding the Fourth Proportional to 139,676.41, 192,757.82 and 79,249.60

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Solution

The fourth proportional to 139,676.41, 192,757.82 and 79,249.60 is: 109,366.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,676.41 : 192,757.82 = 79,249.60 : x
  2. Step 2: Convert to fraction form
    139,676.41/192,757.82 = 79,249.60/x
  3. Step 3: Cross multiply
    139,676.41x = 192,757.82 × 79,249.60
  4. Step 4: Simplify right side
    139,676.41x = 15,275,979,253.73
  5. Step 5: Solve for x
    x = 15,275,979,253.73/139,676.41
  6. Step 6: Final answer
    x = 109,366.93

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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.