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Finding the Third Proportional to 67,980 and 148,920

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Solution

The third proportional to 67,980 and 148,920 is: 326,230.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,980 : 148,920 = 148,920 : x
  2. Step 2: Convert to fraction form
    67,980/148,920 = 148,920/x
  3. Step 3: Cross multiply
    67,980x = 148,920 × 148,920
  4. Step 4: Simplify right side
    67,980x = 22,177,166,400
  5. Step 5: Solve for x
    x = 22,177,166,400/67,980
  6. Step 6: Final answer
    x = 326,230.75

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.