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Finding the Fourth Proportional to 192.39, 288.09 and 111.09

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Solution

The fourth proportional to 192.39, 288.09 and 111.09 is: 166.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.39 : 288.09 = 111.09 : x
  2. Step 2: Convert to fraction form
    192.39/288.09 = 111.09/x
  3. Step 3: Cross multiply
    192.39x = 288.09 × 111.09
  4. Step 4: Simplify right side
    192.39x = 32,003.92
  5. Step 5: Solve for x
    x = 32,003.92/192.39
  6. Step 6: Final answer
    x = 166.35

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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.