Home / 139,205.28-192,103.19-78,774.83

Finding the Fourth Proportional to 139,205.28, 192,103.19 and 78,774.83

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Solution

The fourth proportional to 139,205.28, 192,103.19 and 78,774.83 is: 108,709.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,205.28 : 192,103.19 = 78,774.83 : x
  2. Step 2: Convert to fraction form
    139,205.28/192,103.19 = 78,774.83/x
  3. Step 3: Cross multiply
    139,205.28x = 192,103.19 × 78,774.83
  4. Step 4: Simplify right side
    139,205.28x = 15,132,894,780.32
  5. Step 5: Solve for x
    x = 15,132,894,780.32/139,205.28
  6. Step 6: Final answer
    x = 108,709.20

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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.