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Finding the Fourth Proportional to 139,732.28, 192,819.47 and 79,302.92

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Solution

The fourth proportional to 139,732.28, 192,819.47 and 79,302.92 is: 109,431.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,732.28 : 192,819.47 = 79,302.92 : x
  2. Step 2: Convert to fraction form
    139,732.28/192,819.47 = 79,302.92/x
  3. Step 3: Cross multiply
    139,732.28x = 192,819.47 × 79,302.92
  4. Step 4: Simplify right side
    139,732.28x = 15,291,147,003.85
  5. Step 5: Solve for x
    x = 15,291,147,003.85/139,732.28
  6. Step 6: Final answer
    x = 109,431.74

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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.