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Finding the Third Proportional to 138,660 and 220,392

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Solution

The third proportional to 138,660 and 220,392 is: 350,300.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,660 : 220,392 = 220,392 : x
  2. Step 2: Convert to fraction form
    138,660/220,392 = 220,392/x
  3. Step 3: Cross multiply
    138,660x = 220,392 × 220,392
  4. Step 4: Simplify right side
    138,660x = 48,572,633,664
  5. Step 5: Solve for x
    x = 48,572,633,664/138,660
  6. Step 6: Final answer
    x = 350,300.26

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.