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Finding the Third Proportional to 68,854 and 145,979

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Solution

The third proportional to 68,854 and 145,979 is: 309,493.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,854 : 145,979 = 145,979 : x
  2. Step 2: Convert to fraction form
    68,854/145,979 = 145,979/x
  3. Step 3: Cross multiply
    68,854x = 145,979 × 145,979
  4. Step 4: Simplify right side
    68,854x = 21,309,868,441
  5. Step 5: Solve for x
    x = 21,309,868,441/68,854
  6. Step 6: Final answer
    x = 309,493.54

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.