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Finding the Third Proportional to 91,821 and 188,574

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Solution

The third proportional to 91,821 and 188,574 is: 387,276.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,821 : 188,574 = 188,574 : x
  2. Step 2: Convert to fraction form
    91,821/188,574 = 188,574/x
  3. Step 3: Cross multiply
    91,821x = 188,574 × 188,574
  4. Step 4: Simplify right side
    91,821x = 35,560,153,476
  5. Step 5: Solve for x
    x = 35,560,153,476/91,821
  6. Step 6: Final answer
    x = 387,276.91

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.