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Finding the Third Proportional to 21,177 and 43,740

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Solution

The third proportional to 21,177 and 43,740 is: 90,342.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177 : 43,740 = 43,740 : x
  2. Step 2: Convert to fraction form
    21,177/43,740 = 43,740/x
  3. Step 3: Cross multiply
    21,177x = 43,740 × 43,740
  4. Step 4: Simplify right side
    21,177x = 1,913,187,600
  5. Step 5: Solve for x
    x = 1,913,187,600/21,177
  6. Step 6: Final answer
    x = 90,342.71

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.