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Finding the Fourth Proportional to 192,161.28, 288,272.64 and 81,369.60

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Solution

The fourth proportional to 192,161.28, 288,272.64 and 81,369.60 is: 122,067.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,161.28 : 288,272.64 = 81,369.60 : x
  2. Step 2: Convert to fraction form
    192,161.28/288,272.64 = 81,369.60/x
  3. Step 3: Cross multiply
    192,161.28x = 288,272.64 × 81,369.60
  4. Step 4: Simplify right side
    192,161.28x = 23,456,629,407.74
  5. Step 5: Solve for x
    x = 23,456,629,407.74/192,161.28
  6. Step 6: Final answer
    x = 122,067.41

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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.