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Finding the Third Proportional to 69,721 and 105,237

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Solution

The third proportional to 69,721 and 105,237 is: 158,844.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,721 : 105,237 = 105,237 : x
  2. Step 2: Convert to fraction form
    69,721/105,237 = 105,237/x
  3. Step 3: Cross multiply
    69,721x = 105,237 × 105,237
  4. Step 4: Simplify right side
    69,721x = 11,074,826,169
  5. Step 5: Solve for x
    x = 11,074,826,169/69,721
  6. Step 6: Final answer
    x = 158,844.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.