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Finding the Fourth Proportional to 149, 223.78 and 122

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Solution

The fourth proportional to 149, 223.78 and 122 is: 183.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    149 : 223.78 = 122 : x
  2. Step 2: Convert to fraction form
    149/223.78 = 122/x
  3. Step 3: Cross multiply
    149x = 223.78 × 122
  4. Step 4: Simplify right side
    149x = 27,301.16
  5. Step 5: Solve for x
    x = 27,301.16/149
  6. Step 6: Final answer
    x = 183.23

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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.