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Finding the Fourth Proportional to 120.66, 181.22 and 94.92

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Solution

The fourth proportional to 120.66, 181.22 and 94.92 is: 142.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.66 : 181.22 = 94.92 : x
  2. Step 2: Convert to fraction form
    120.66/181.22 = 94.92/x
  3. Step 3: Cross multiply
    120.66x = 181.22 × 94.92
  4. Step 4: Simplify right side
    120.66x = 17,200.93
  5. Step 5: Solve for x
    x = 17,200.93/120.66
  6. Step 6: Final answer
    x = 142.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.