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Finding the Third Proportional to 18,073.13 and 39,221.72

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Solution

The third proportional to 18,073.13 and 39,221.72 is: 85,117.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,073.13 : 39,221.72 = 39,221.72 : x
  2. Step 2: Convert to fraction form
    18,073.13/39,221.72 = 39,221.72/x
  3. Step 3: Cross multiply
    18,073.13x = 39,221.72 × 39,221.72
  4. Step 4: Simplify right side
    18,073.13x = 1,538,343,221.70
  5. Step 5: Solve for x
    x = 1,538,343,221.70/18,073.13
  6. Step 6: Final answer
    x = 85,117.72

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.