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Finding the Fourth Proportional to 139,361.66, 192,213.12 and 96,412.62

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Solution

The fourth proportional to 139,361.66, 192,213.12 and 96,412.62 is: 132,976.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,361.66 : 192,213.12 = 96,412.62 : x
  2. Step 2: Convert to fraction form
    139,361.66/192,213.12 = 96,412.62/x
  3. Step 3: Cross multiply
    139,361.66x = 192,213.12 × 96,412.62
  4. Step 4: Simplify right side
    139,361.66x = 18,531,770,497.57
  5. Step 5: Solve for x
    x = 18,531,770,497.57/139,361.66
  6. Step 6: Final answer
    x = 132,976.11

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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.