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Finding the Third Proportional to 30,845 and 66,369

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Solution

The third proportional to 30,845 and 66,369 is: 142,805.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,845 : 66,369 = 66,369 : x
  2. Step 2: Convert to fraction form
    30,845/66,369 = 66,369/x
  3. Step 3: Cross multiply
    30,845x = 66,369 × 66,369
  4. Step 4: Simplify right side
    30,845x = 4,404,844,161
  5. Step 5: Solve for x
    x = 4,404,844,161/30,845
  6. Step 6: Final answer
    x = 142,805.78

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.