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Finding the Third Proportional to 45,391 and 99,740

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Solution

The third proportional to 45,391 and 99,740 is: 219,163.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,391 : 99,740 = 99,740 : x
  2. Step 2: Convert to fraction form
    45,391/99,740 = 99,740/x
  3. Step 3: Cross multiply
    45,391x = 99,740 × 99,740
  4. Step 4: Simplify right side
    45,391x = 9,948,067,600
  5. Step 5: Solve for x
    x = 9,948,067,600/45,391
  6. Step 6: Final answer
    x = 219,163.88

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.