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Finding the Fourth Proportional to 192.51, 265.73 and 121.68

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Solution

The fourth proportional to 192.51, 265.73 and 121.68 is: 167.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.51 : 265.73 = 121.68 : x
  2. Step 2: Convert to fraction form
    192.51/265.73 = 121.68/x
  3. Step 3: Cross multiply
    192.51x = 265.73 × 121.68
  4. Step 4: Simplify right side
    192.51x = 32,333.42
  5. Step 5: Solve for x
    x = 32,333.42/192.51
  6. Step 6: Final answer
    x = 167.96

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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.