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Finding the Fourth Proportional to 120.69, 166.46 and 102.33

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Solution

The fourth proportional to 120.69, 166.46 and 102.33 is: 141.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.69 : 166.46 = 102.33 : x
  2. Step 2: Convert to fraction form
    120.69/166.46 = 102.33/x
  3. Step 3: Cross multiply
    120.69x = 166.46 × 102.33
  4. Step 4: Simplify right side
    120.69x = 17,033.34
  5. Step 5: Solve for x
    x = 17,033.34/120.69
  6. Step 6: Final answer
    x = 141.13

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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.