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Finding the Third Proportional to 69,686 and 149,209

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Solution

The third proportional to 69,686 and 149,209 is: 319,480.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,686 : 149,209 = 149,209 : x
  2. Step 2: Convert to fraction form
    69,686/149,209 = 149,209/x
  3. Step 3: Cross multiply
    69,686x = 149,209 × 149,209
  4. Step 4: Simplify right side
    69,686x = 22,263,325,681
  5. Step 5: Solve for x
    x = 22,263,325,681/69,686
  6. Step 6: Final answer
    x = 319,480.61

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.