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Finding the Fourth Proportional to 192.09, 265.06 and 121.19

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Solution

The fourth proportional to 192.09, 265.06 and 121.19 is: 167.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.09 : 265.06 = 121.19 : x
  2. Step 2: Convert to fraction form
    192.09/265.06 = 121.19/x
  3. Step 3: Cross multiply
    192.09x = 265.06 × 121.19
  4. Step 4: Simplify right side
    192.09x = 32,121.66
  5. Step 5: Solve for x
    x = 32,121.66/192.09
  6. Step 6: Final answer
    x = 167.22

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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.