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Finding the Fourth Proportional to 149.00, 223.55 and 80.42

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Solution

The fourth proportional to 149.00, 223.55 and 80.42 is: 120.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.00 : 223.55 = 80.42 : x
  2. Step 2: Convert to fraction form
    149.00/223.55 = 80.42/x
  3. Step 3: Cross multiply
    149.00x = 223.55 × 80.42
  4. Step 4: Simplify right side
    149.00x = 17,976.37
  5. Step 5: Solve for x
    x = 17,976.37/149.00
  6. Step 6: Final answer
    x = 120.65

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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.