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Finding the Third Proportional to 81,246 and 121,869

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Solution

The third proportional to 81,246 and 121,869 is: 182,803.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,246 : 121,869 = 121,869 : x
  2. Step 2: Convert to fraction form
    81,246/121,869 = 121,869/x
  3. Step 3: Cross multiply
    81,246x = 121,869 × 121,869
  4. Step 4: Simplify right side
    81,246x = 14,852,053,161
  5. Step 5: Solve for x
    x = 14,852,053,161/81,246
  6. Step 6: Final answer
    x = 182,803.50

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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.