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Finding the Third Proportional to 42,657 and 66,910

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Solution

The third proportional to 42,657 and 66,910 is: 104,952.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,657 : 66,910 = 66,910 : x
  2. Step 2: Convert to fraction form
    42,657/66,910 = 66,910/x
  3. Step 3: Cross multiply
    42,657x = 66,910 × 66,910
  4. Step 4: Simplify right side
    42,657x = 4,476,948,100
  5. Step 5: Solve for x
    x = 4,476,948,100/42,657
  6. Step 6: Final answer
    x = 104,952.25

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.