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Finding the Third Proportional to 69,979 and 149,302

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Solution

The third proportional to 69,979 and 149,302 is: 318,539.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,979 : 149,302 = 149,302 : x
  2. Step 2: Convert to fraction form
    69,979/149,302 = 149,302/x
  3. Step 3: Cross multiply
    69,979x = 149,302 × 149,302
  4. Step 4: Simplify right side
    69,979x = 22,291,087,204
  5. Step 5: Solve for x
    x = 22,291,087,204/69,979
  6. Step 6: Final answer
    x = 318,539.66

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.