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Finding the Third Proportional to 67,989 and 149,418

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Solution

The third proportional to 67,989 and 149,418 is: 328,372.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,989 : 149,418 = 149,418 : x
  2. Step 2: Convert to fraction form
    67,989/149,418 = 149,418/x
  3. Step 3: Cross multiply
    67,989x = 149,418 × 149,418
  4. Step 4: Simplify right side
    67,989x = 22,325,738,724
  5. Step 5: Solve for x
    x = 22,325,738,724/67,989
  6. Step 6: Final answer
    x = 328,372.81

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.