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Finding the Third Proportional to 81,948 and 128,628

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Solution

The third proportional to 81,948 and 128,628 is: 201,898.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,948 : 128,628 = 128,628 : x
  2. Step 2: Convert to fraction form
    81,948/128,628 = 128,628/x
  3. Step 3: Cross multiply
    81,948x = 128,628 × 128,628
  4. Step 4: Simplify right side
    81,948x = 16,545,162,384
  5. Step 5: Solve for x
    x = 16,545,162,384/81,948
  6. Step 6: Final answer
    x = 201,898.31

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.