Home / 120.24-180.15-104.85

Finding the Fourth Proportional to 120.24, 180.15 and 104.85

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Solution

The fourth proportional to 120.24, 180.15 and 104.85 is: 157.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.24 : 180.15 = 104.85 : x
  2. Step 2: Convert to fraction form
    120.24/180.15 = 104.85/x
  3. Step 3: Cross multiply
    120.24x = 180.15 × 104.85
  4. Step 4: Simplify right side
    120.24x = 18,888.73
  5. Step 5: Solve for x
    x = 18,888.73/120.24
  6. Step 6: Final answer
    x = 157.09

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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.