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Finding the Third Proportional to 42,992 and 68,396

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Solution

The third proportional to 42,992 and 68,396 is: 108,811.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,992 : 68,396 = 68,396 : x
  2. Step 2: Convert to fraction form
    42,992/68,396 = 68,396/x
  3. Step 3: Cross multiply
    42,992x = 68,396 × 68,396
  4. Step 4: Simplify right side
    42,992x = 4,678,012,816
  5. Step 5: Solve for x
    x = 4,678,012,816/42,992
  6. Step 6: Final answer
    x = 108,811.24

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.