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Finding the Third Proportional to 39,379.50 and 85,671

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Solution

The third proportional to 39,379.50 and 85,671 is: 186,379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,379.50 : 85,671 = 85,671 : x
  2. Step 2: Convert to fraction form
    39,379.50/85,671 = 85,671/x
  3. Step 3: Cross multiply
    39,379.50x = 85,671 × 85,671
  4. Step 4: Simplify right side
    39,379.50x = 7,339,520,241
  5. Step 5: Solve for x
    x = 7,339,520,241/39,379.50
  6. Step 6: Final answer
    x = 186,379.21

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.