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Finding the Third Proportional to 54,439 and 81,658

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Solution

The third proportional to 54,439 and 81,658 is: 122,486.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,439 : 81,658 = 81,658 : x
  2. Step 2: Convert to fraction form
    54,439/81,658 = 81,658/x
  3. Step 3: Cross multiply
    54,439x = 81,658 × 81,658
  4. Step 4: Simplify right side
    54,439x = 6,668,028,964
  5. Step 5: Solve for x
    x = 6,668,028,964/54,439
  6. Step 6: Final answer
    x = 122,486.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.