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Finding the Third Proportional to 39,664 and 81,836

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Solution

The third proportional to 39,664 and 81,836 is: 168,846.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,664 : 81,836 = 81,836 : x
  2. Step 2: Convert to fraction form
    39,664/81,836 = 81,836/x
  3. Step 3: Cross multiply
    39,664x = 81,836 × 81,836
  4. Step 4: Simplify right side
    39,664x = 6,697,130,896
  5. Step 5: Solve for x
    x = 6,697,130,896/39,664
  6. Step 6: Final answer
    x = 168,846.58

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.