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Finding the Fourth Proportional to 139,352.40, 192,322.89 and 82,763.91

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Solution

The fourth proportional to 139,352.40, 192,322.89 and 82,763.91 is: 114,224.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,352.40 : 192,322.89 = 82,763.91 : x
  2. Step 2: Convert to fraction form
    139,352.40/192,322.89 = 82,763.91/x
  3. Step 3: Cross multiply
    139,352.40x = 192,322.89 × 82,763.91
  4. Step 4: Simplify right side
    139,352.40x = 15,917,394,358.90
  5. Step 5: Solve for x
    x = 15,917,394,358.90/139,352.40
  6. Step 6: Final answer
    x = 114,224.04

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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.