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Finding the Third Proportional to 68,422 and 149,912

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Solution

The third proportional to 68,422 and 149,912 is: 328,455.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,422 : 149,912 = 149,912 : x
  2. Step 2: Convert to fraction form
    68,422/149,912 = 149,912/x
  3. Step 3: Cross multiply
    68,422x = 149,912 × 149,912
  4. Step 4: Simplify right side
    68,422x = 22,473,607,744
  5. Step 5: Solve for x
    x = 22,473,607,744/68,422
  6. Step 6: Final answer
    x = 328,455.87

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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.