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Finding the Third Proportional to 126,128.39 and 189,722.25

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Solution

The third proportional to 126,128.39 and 189,722.25 is: 285,380.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,128.39 : 189,722.25 = 189,722.25 : x
  2. Step 2: Convert to fraction form
    126,128.39/189,722.25 = 189,722.25/x
  3. Step 3: Cross multiply
    126,128.39x = 189,722.25 × 189,722.25
  4. Step 4: Simplify right side
    126,128.39x = 35,994,532,145.06
  5. Step 5: Solve for x
    x = 35,994,532,145.06/126,128.39
  6. Step 6: Final answer
    x = 285,380.10

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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.