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Finding the Third Proportional to 38,221 and 51,620

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Solution

The third proportional to 38,221 and 51,620 is: 69,716.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,221 : 51,620 = 51,620 : x
  2. Step 2: Convert to fraction form
    38,221/51,620 = 51,620/x
  3. Step 3: Cross multiply
    38,221x = 51,620 × 51,620
  4. Step 4: Simplify right side
    38,221x = 2,664,624,400
  5. Step 5: Solve for x
    x = 2,664,624,400/38,221
  6. Step 6: Final answer
    x = 69,716.24

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.