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Finding the Fourth Proportional to 67,315.20, 100,972.78 and 18,067.20

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Solution

The fourth proportional to 67,315.20, 100,972.78 and 18,067.20 is: 27,100.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,315.20 : 100,972.78 = 18,067.20 : x
  2. Step 2: Convert to fraction form
    67,315.20/100,972.78 = 18,067.20/x
  3. Step 3: Cross multiply
    67,315.20x = 100,972.78 × 18,067.20
  4. Step 4: Simplify right side
    67,315.20x = 1,824,295,410.82
  5. Step 5: Solve for x
    x = 1,824,295,410.82/67,315.20
  6. Step 6: Final answer
    x = 27,100.79

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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.