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Finding the Fourth Proportional to 251.12, 376.77 and 121.17

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Solution

The fourth proportional to 251.12, 376.77 and 121.17 is: 181.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.12 : 376.77 = 121.17 : x
  2. Step 2: Convert to fraction form
    251.12/376.77 = 121.17/x
  3. Step 3: Cross multiply
    251.12x = 376.77 × 121.17
  4. Step 4: Simplify right side
    251.12x = 45,652.62
  5. Step 5: Solve for x
    x = 45,652.62/251.12
  6. Step 6: Final answer
    x = 181.80

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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.