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Finding the Fourth Proportional to 139,366.53, 192,353.81 and 82,766.97

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Solution

The fourth proportional to 139,366.53, 192,353.81 and 82,766.97 is: 114,235.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,366.53 : 192,353.81 = 82,766.97 : x
  2. Step 2: Convert to fraction form
    139,366.53/192,353.81 = 82,766.97/x
  3. Step 3: Cross multiply
    139,366.53x = 192,353.81 × 82,766.97
  4. Step 4: Simplify right side
    139,366.53x = 15,920,541,607.82
  5. Step 5: Solve for x
    x = 15,920,541,607.82/139,366.53
  6. Step 6: Final answer
    x = 114,235.04

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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.