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Finding the Third Proportional to 51,928 and 81,368

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Solution

The third proportional to 51,928 and 81,368 is: 127,498.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,928 : 81,368 = 81,368 : x
  2. Step 2: Convert to fraction form
    51,928/81,368 = 81,368/x
  3. Step 3: Cross multiply
    51,928x = 81,368 × 81,368
  4. Step 4: Simplify right side
    51,928x = 6,620,751,424
  5. Step 5: Solve for x
    x = 6,620,751,424/51,928
  6. Step 6: Final answer
    x = 127,498.68

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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.