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Finding the Third Proportional to 77,274 and 162,990

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Solution

The third proportional to 77,274 and 162,990 is: 343,786.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,274 : 162,990 = 162,990 : x
  2. Step 2: Convert to fraction form
    77,274/162,990 = 162,990/x
  3. Step 3: Cross multiply
    77,274x = 162,990 × 162,990
  4. Step 4: Simplify right side
    77,274x = 26,565,740,100
  5. Step 5: Solve for x
    x = 26,565,740,100/77,274
  6. Step 6: Final answer
    x = 343,786.27

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.