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Finding the Third Proportional to 54,579 and 86,790

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Solution

The third proportional to 54,579 and 86,790 is: 138,011.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,579 : 86,790 = 86,790 : x
  2. Step 2: Convert to fraction form
    54,579/86,790 = 86,790/x
  3. Step 3: Cross multiply
    54,579x = 86,790 × 86,790
  4. Step 4: Simplify right side
    54,579x = 7,532,504,100
  5. Step 5: Solve for x
    x = 7,532,504,100/54,579
  6. Step 6: Final answer
    x = 138,011.03

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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.