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Finding the Fourth Proportional to 192.18, 265.20 and 109.29

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Solution

The fourth proportional to 192.18, 265.20 and 109.29 is: 150.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.18 : 265.20 = 109.29 : x
  2. Step 2: Convert to fraction form
    192.18/265.20 = 109.29/x
  3. Step 3: Cross multiply
    192.18x = 265.20 × 109.29
  4. Step 4: Simplify right side
    192.18x = 28,982.38
  5. Step 5: Solve for x
    x = 28,982.38/192.18
  6. Step 6: Final answer
    x = 150.81

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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.