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Finding the Fourth Proportional to 139,610.25, 192,647.57 and 79,161.57

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Solution

The fourth proportional to 139,610.25, 192,647.57 and 79,161.57 is: 109,234.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,610.25 : 192,647.57 = 79,161.57 : x
  2. Step 2: Convert to fraction form
    139,610.25/192,647.57 = 79,161.57/x
  3. Step 3: Cross multiply
    139,610.25x = 192,647.57 × 79,161.57
  4. Step 4: Simplify right side
    139,610.25x = 15,250,283,702.08
  5. Step 5: Solve for x
    x = 15,250,283,702.08/139,610.25
  6. Step 6: Final answer
    x = 109,234.70

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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.