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Finding the Fourth Proportional to 192.81, 265.93 and 122.79

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Solution

The fourth proportional to 192.81, 265.93 and 122.79 is: 169.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.81 : 265.93 = 122.79 : x
  2. Step 2: Convert to fraction form
    192.81/265.93 = 122.79/x
  3. Step 3: Cross multiply
    192.81x = 265.93 × 122.79
  4. Step 4: Simplify right side
    192.81x = 32,654.18
  5. Step 5: Solve for x
    x = 32,654.18/192.81
  6. Step 6: Final answer
    x = 169.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.