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Finding the Third Proportional to 103,665 and 218,400

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Solution

The third proportional to 103,665 and 218,400 is: 460,122.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,665 : 218,400 = 218,400 : x
  2. Step 2: Convert to fraction form
    103,665/218,400 = 218,400/x
  3. Step 3: Cross multiply
    103,665x = 218,400 × 218,400
  4. Step 4: Simplify right side
    103,665x = 47,698,560,000
  5. Step 5: Solve for x
    x = 47,698,560,000/103,665
  6. Step 6: Final answer
    x = 460,122.12

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.