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Finding the Third Proportional to 67,878 and 98,739

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Solution

The third proportional to 67,878 and 98,739 is: 143,631.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,878 : 98,739 = 98,739 : x
  2. Step 2: Convert to fraction form
    67,878/98,739 = 98,739/x
  3. Step 3: Cross multiply
    67,878x = 98,739 × 98,739
  4. Step 4: Simplify right side
    67,878x = 9,749,390,121
  5. Step 5: Solve for x
    x = 9,749,390,121/67,878
  6. Step 6: Final answer
    x = 143,631.08

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.