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Finding the Third Proportional to 115,286 and 172,930

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Solution

The third proportional to 115,286 and 172,930 is: 259,396.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,286 : 172,930 = 172,930 : x
  2. Step 2: Convert to fraction form
    115,286/172,930 = 172,930/x
  3. Step 3: Cross multiply
    115,286x = 172,930 × 172,930
  4. Step 4: Simplify right side
    115,286x = 29,904,784,900
  5. Step 5: Solve for x
    x = 29,904,784,900/115,286
  6. Step 6: Final answer
    x = 259,396.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.