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Finding the Third Proportional to 64,640 and 138,496

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Solution

The third proportional to 64,640 and 138,496 is: 296,737.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,640 : 138,496 = 138,496 : x
  2. Step 2: Convert to fraction form
    64,640/138,496 = 138,496/x
  3. Step 3: Cross multiply
    64,640x = 138,496 × 138,496
  4. Step 4: Simplify right side
    64,640x = 19,181,142,016
  5. Step 5: Solve for x
    x = 19,181,142,016/64,640
  6. Step 6: Final answer
    x = 296,737.96

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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.