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Finding the Third Proportional to 81,220 and 121,494

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Solution

The third proportional to 81,220 and 121,494 is: 181,738.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,220 : 121,494 = 121,494 : x
  2. Step 2: Convert to fraction form
    81,220/121,494 = 121,494/x
  3. Step 3: Cross multiply
    81,220x = 121,494 × 121,494
  4. Step 4: Simplify right side
    81,220x = 14,760,792,036
  5. Step 5: Solve for x
    x = 14,760,792,036/81,220
  6. Step 6: Final answer
    x = 181,738.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.