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Finding the Fourth Proportional to 73,119.43, 109,722.84 and 67,170.79

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Solution

The fourth proportional to 73,119.43, 109,722.84 and 67,170.79 is: 100,796.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,119.43 : 109,722.84 = 67,170.79 : x
  2. Step 2: Convert to fraction form
    73,119.43/109,722.84 = 67,170.79/x
  3. Step 3: Cross multiply
    73,119.43x = 109,722.84 × 67,170.79
  4. Step 4: Simplify right side
    73,119.43x = 7,370,169,843.84
  5. Step 5: Solve for x
    x = 7,370,169,843.84/73,119.43
  6. Step 6: Final answer
    x = 100,796.33

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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.