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Finding the Third Proportional to 77,928 and 169,517

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Solution

The third proportional to 77,928 and 169,517 is: 368,750.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,928 : 169,517 = 169,517 : x
  2. Step 2: Convert to fraction form
    77,928/169,517 = 169,517/x
  3. Step 3: Cross multiply
    77,928x = 169,517 × 169,517
  4. Step 4: Simplify right side
    77,928x = 28,736,013,289
  5. Step 5: Solve for x
    x = 28,736,013,289/77,928
  6. Step 6: Final answer
    x = 368,750.81

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.