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Finding the Third Proportional to 101,811 and 218,690

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Solution

The third proportional to 101,811 and 218,690 is: 469,746.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,811 : 218,690 = 218,690 : x
  2. Step 2: Convert to fraction form
    101,811/218,690 = 218,690/x
  3. Step 3: Cross multiply
    101,811x = 218,690 × 218,690
  4. Step 4: Simplify right side
    101,811x = 47,825,316,100
  5. Step 5: Solve for x
    x = 47,825,316,100/101,811
  6. Step 6: Final answer
    x = 469,746.06

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.