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Finding the Fourth Proportional to 139,321.93, 192,253.61 and 81,963.53

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Solution

The fourth proportional to 139,321.93, 192,253.61 and 81,963.53 is: 113,103.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,321.93 : 192,253.61 = 81,963.53 : x
  2. Step 2: Convert to fraction form
    139,321.93/192,253.61 = 81,963.53/x
  3. Step 3: Cross multiply
    139,321.93x = 192,253.61 × 81,963.53
  4. Step 4: Simplify right side
    139,321.93x = 15,757,784,121.03
  5. Step 5: Solve for x
    x = 15,757,784,121.03/139,321.93
  6. Step 6: Final answer
    x = 113,103.41

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1.5x scale

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.