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Finding the Fourth Proportional to 120.03, 179.12 and 115.62

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Solution

The fourth proportional to 120.03, 179.12 and 115.62 is: 172.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.03 : 179.12 = 115.62 : x
  2. Step 2: Convert to fraction form
    120.03/179.12 = 115.62/x
  3. Step 3: Cross multiply
    120.03x = 179.12 × 115.62
  4. Step 4: Simplify right side
    120.03x = 20,709.85
  5. Step 5: Solve for x
    x = 20,709.85/120.03
  6. Step 6: Final answer
    x = 172.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.