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Finding the Third Proportional to 74,391 and 111,749

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Solution

The third proportional to 74,391 and 111,749 is: 167,867.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,391 : 111,749 = 111,749 : x
  2. Step 2: Convert to fraction form
    74,391/111,749 = 111,749/x
  3. Step 3: Cross multiply
    74,391x = 111,749 × 111,749
  4. Step 4: Simplify right side
    74,391x = 12,487,839,001
  5. Step 5: Solve for x
    x = 12,487,839,001/74,391
  6. Step 6: Final answer
    x = 167,867.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.