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Finding the Fourth Proportional to 139,750.62, 192,920.85 and 82,371.84

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Solution

The fourth proportional to 139,750.62, 192,920.85 and 82,371.84 is: 113,711.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,750.62 : 192,920.85 = 82,371.84 : x
  2. Step 2: Convert to fraction form
    139,750.62/192,920.85 = 82,371.84/x
  3. Step 3: Cross multiply
    139,750.62x = 192,920.85 × 82,371.84
  4. Step 4: Simplify right side
    139,750.62x = 15,891,245,388.86
  5. Step 5: Solve for x
    x = 15,891,245,388.86/139,750.62
  6. Step 6: Final answer
    x = 113,711.45

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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.