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Finding the Fourth Proportional to 139,354.21, 192,310.37 and 82,006.21

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Solution

The fourth proportional to 139,354.21, 192,310.37 and 82,006.21 is: 113,169.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,354.21 : 192,310.37 = 82,006.21 : x
  2. Step 2: Convert to fraction form
    139,354.21/192,310.37 = 82,006.21/x
  3. Step 3: Cross multiply
    139,354.21x = 192,310.37 × 82,006.21
  4. Step 4: Simplify right side
    139,354.21x = 15,770,644,587.40
  5. Step 5: Solve for x
    x = 15,770,644,587.40/139,354.21
  6. Step 6: Final answer
    x = 113,169.49

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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.