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Finding the Third Proportional to 62,860 and 85,420

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Solution

The third proportional to 62,860 and 85,420 is: 116,076.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,860 : 85,420 = 85,420 : x
  2. Step 2: Convert to fraction form
    62,860/85,420 = 85,420/x
  3. Step 3: Cross multiply
    62,860x = 85,420 × 85,420
  4. Step 4: Simplify right side
    62,860x = 7,296,576,400
  5. Step 5: Solve for x
    x = 7,296,576,400/62,860
  6. Step 6: Final answer
    x = 116,076.62

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.