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Finding the Fourth Proportional to 149.80, 224.22 and 121

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Solution

The fourth proportional to 149.80, 224.22 and 121 is: 181.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.80 : 224.22 = 121 : x
  2. Step 2: Convert to fraction form
    149.80/224.22 = 121/x
  3. Step 3: Cross multiply
    149.80x = 224.22 × 121
  4. Step 4: Simplify right side
    149.80x = 27,130.62
  5. Step 5: Solve for x
    x = 27,130.62/149.80
  6. Step 6: Final answer
    x = 181.11

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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.