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Finding the Third Proportional to 68,915.25 and 100,638

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Solution

The third proportional to 68,915.25 and 100,638 is: 146,963.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,915.25 : 100,638 = 100,638 : x
  2. Step 2: Convert to fraction form
    68,915.25/100,638 = 100,638/x
  3. Step 3: Cross multiply
    68,915.25x = 100,638 × 100,638
  4. Step 4: Simplify right side
    68,915.25x = 10,128,007,044
  5. Step 5: Solve for x
    x = 10,128,007,044/68,915.25
  6. Step 6: Final answer
    x = 146,963.22

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.