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Finding the Third Proportional to 20,866.50 and 45,687

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Solution

The third proportional to 20,866.50 and 45,687 is: 100,031.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.50 : 45,687 = 45,687 : x
  2. Step 2: Convert to fraction form
    20,866.50/45,687 = 45,687/x
  3. Step 3: Cross multiply
    20,866.50x = 45,687 × 45,687
  4. Step 4: Simplify right side
    20,866.50x = 2,087,301,969
  5. Step 5: Solve for x
    x = 2,087,301,969/20,866.50
  6. Step 6: Final answer
    x = 100,031.24

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.