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Finding the Third Proportional to 42,630 and 68,103

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Solution

The third proportional to 42,630 and 68,103 is: 108,797.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,630 : 68,103 = 68,103 : x
  2. Step 2: Convert to fraction form
    42,630/68,103 = 68,103/x
  3. Step 3: Cross multiply
    42,630x = 68,103 × 68,103
  4. Step 4: Simplify right side
    42,630x = 4,638,018,609
  5. Step 5: Solve for x
    x = 4,638,018,609/42,630
  6. Step 6: Final answer
    x = 108,797.06

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.