Home / 139,350.12-192,305.22-78,919.26

Finding the Fourth Proportional to 139,350.12, 192,305.22 and 78,919.26

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Solution

The fourth proportional to 139,350.12, 192,305.22 and 78,919.26 is: 108,909.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,350.12 : 192,305.22 = 78,919.26 : x
  2. Step 2: Convert to fraction form
    139,350.12/192,305.22 = 78,919.26/x
  3. Step 3: Cross multiply
    139,350.12x = 192,305.22 × 78,919.26
  4. Step 4: Simplify right side
    139,350.12x = 15,176,585,656.54
  5. Step 5: Solve for x
    x = 15,176,585,656.54/139,350.12
  6. Step 6: Final answer
    x = 108,909.74

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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.