Home / 139,228.38-192,089.43-78,793.02

Finding the Fourth Proportional to 139,228.38, 192,089.43 and 78,793.02

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Solution

The fourth proportional to 139,228.38, 192,089.43 and 78,793.02 is: 108,708.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,228.38 : 192,089.43 = 78,793.02 : x
  2. Step 2: Convert to fraction form
    139,228.38/192,089.43 = 78,793.02/x
  3. Step 3: Cross multiply
    139,228.38x = 192,089.43 × 78,793.02
  4. Step 4: Simplify right side
    139,228.38x = 15,135,306,299.78
  5. Step 5: Solve for x
    x = 15,135,306,299.78/139,228.38
  6. Step 6: Final answer
    x = 108,708.49

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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.