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Finding the Fourth Proportional to 148.98, 205.83 and 120.18

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Solution

The fourth proportional to 148.98, 205.83 and 120.18 is: 166.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.98 : 205.83 = 120.18 : x
  2. Step 2: Convert to fraction form
    148.98/205.83 = 120.18/x
  3. Step 3: Cross multiply
    148.98x = 205.83 × 120.18
  4. Step 4: Simplify right side
    148.98x = 24,736.65
  5. Step 5: Solve for x
    x = 24,736.65/148.98
  6. Step 6: Final answer
    x = 166.04

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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.