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Finding the Third Proportional to 69,687 and 149,211

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Solution

The third proportional to 69,687 and 149,211 is: 319,484.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,687 : 149,211 = 149,211 : x
  2. Step 2: Convert to fraction form
    69,687/149,211 = 149,211/x
  3. Step 3: Cross multiply
    69,687x = 149,211 × 149,211
  4. Step 4: Simplify right side
    69,687x = 22,263,922,521
  5. Step 5: Solve for x
    x = 22,263,922,521/69,687
  6. Step 6: Final answer
    x = 319,484.59

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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.