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Finding the Third Proportional to 30,814 and 66,377

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Solution

The third proportional to 30,814 and 66,377 is: 142,983.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,814 : 66,377 = 66,377 : x
  2. Step 2: Convert to fraction form
    30,814/66,377 = 66,377/x
  3. Step 3: Cross multiply
    30,814x = 66,377 × 66,377
  4. Step 4: Simplify right side
    30,814x = 4,405,906,129
  5. Step 5: Solve for x
    x = 4,405,906,129/30,814
  6. Step 6: Final answer
    x = 142,983.91

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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.