Home / 139,818.11-192,902.96-81,661.48

Finding the Fourth Proportional to 139,818.11, 192,902.96 and 81,661.48

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Solution

The fourth proportional to 139,818.11, 192,902.96 and 81,661.48 is: 112,665.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,818.11 : 192,902.96 = 81,661.48 : x
  2. Step 2: Convert to fraction form
    139,818.11/192,902.96 = 81,661.48/x
  3. Step 3: Cross multiply
    139,818.11x = 192,902.96 × 81,661.48
  4. Step 4: Simplify right side
    139,818.11x = 15,752,741,455.36
  5. Step 5: Solve for x
    x = 15,752,741,455.36/139,818.11
  6. Step 6: Final answer
    x = 112,665.96

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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.