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Finding the Fourth Proportional to 67,315.19, 100,972.78 and 18,067.19

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Solution

The fourth proportional to 67,315.19, 100,972.78 and 18,067.19 is: 27,100.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,315.19 : 100,972.78 = 18,067.19 : x
  2. Step 2: Convert to fraction form
    67,315.19/100,972.78 = 18,067.19/x
  3. Step 3: Cross multiply
    67,315.19x = 100,972.78 × 18,067.19
  4. Step 4: Simplify right side
    67,315.19x = 1,824,294,401.09
  5. Step 5: Solve for x
    x = 1,824,294,401.09/67,315.19
  6. Step 6: Final answer
    x = 27,100.78

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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.