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Finding the Fourth Proportional to 192.78, 288.97 and 101.39

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Solution

The fourth proportional to 192.78, 288.97 and 101.39 is: 151.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.78 : 288.97 = 101.39 : x
  2. Step 2: Convert to fraction form
    192.78/288.97 = 101.39/x
  3. Step 3: Cross multiply
    192.78x = 288.97 × 101.39
  4. Step 4: Simplify right side
    192.78x = 29,296.97
  5. Step 5: Solve for x
    x = 29,296.97/192.78
  6. Step 6: Final answer
    x = 151.97

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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.