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Finding the Third Proportional to 133,872 and 207,408

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Solution

The third proportional to 133,872 and 207,408 is: 321,337.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,872 : 207,408 = 207,408 : x
  2. Step 2: Convert to fraction form
    133,872/207,408 = 207,408/x
  3. Step 3: Cross multiply
    133,872x = 207,408 × 207,408
  4. Step 4: Simplify right side
    133,872x = 43,018,078,464
  5. Step 5: Solve for x
    x = 43,018,078,464/133,872
  6. Step 6: Final answer
    x = 321,337.39

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.