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Finding the Fourth Proportional to 149.24, 206 and 122.76

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Solution

The fourth proportional to 149.24, 206 and 122.76 is: 169.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.24 : 206 = 122.76 : x
  2. Step 2: Convert to fraction form
    149.24/206 = 122.76/x
  3. Step 3: Cross multiply
    149.24x = 206 × 122.76
  4. Step 4: Simplify right side
    149.24x = 25,288.56
  5. Step 5: Solve for x
    x = 25,288.56/149.24
  6. Step 6: Final answer
    x = 169.45

Related Problems

Find fourth proportional to 74.62, 103 and 61.38
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.