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Finding the Fourth Proportional to 139,353.25, 192,310.02 and 78,936.44

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Solution

The fourth proportional to 139,353.25, 192,310.02 and 78,936.44 is: 108,933.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,353.25 : 192,310.02 = 78,936.44 : x
  2. Step 2: Convert to fraction form
    139,353.25/192,310.02 = 78,936.44/x
  3. Step 3: Cross multiply
    139,353.25x = 192,310.02 × 78,936.44
  4. Step 4: Simplify right side
    139,353.25x = 15,180,268,355.13
  5. Step 5: Solve for x
    x = 15,180,268,355.13/139,353.25
  6. Step 6: Final answer
    x = 108,933.72

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1.5x scale

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.