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Finding the Third Proportional to 138,246.75 and 208,638

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Solution

The third proportional to 138,246.75 and 208,638 is: 314,870.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,246.75 : 208,638 = 208,638 : x
  2. Step 2: Convert to fraction form
    138,246.75/208,638 = 208,638/x
  3. Step 3: Cross multiply
    138,246.75x = 208,638 × 208,638
  4. Step 4: Simplify right side
    138,246.75x = 43,529,815,044
  5. Step 5: Solve for x
    x = 43,529,815,044/138,246.75
  6. Step 6: Final answer
    x = 314,870.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.