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Finding the Fourth Proportional to 139,179.92, 192,068 and 75,517.70

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Solution

The fourth proportional to 139,179.92, 192,068 and 75,517.70 is: 104,214.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,179.92 : 192,068 = 75,517.70 : x
  2. Step 2: Convert to fraction form
    139,179.92/192,068 = 75,517.70/x
  3. Step 3: Cross multiply
    139,179.92x = 192,068 × 75,517.70
  4. Step 4: Simplify right side
    139,179.92x = 14,504,533,603.60
  5. Step 5: Solve for x
    x = 14,504,533,603.60/139,179.92
  6. Step 6: Final answer
    x = 104,214.27

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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.