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Finding the Fourth Proportional to 150, 206.44 and 123.56

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Solution

The fourth proportional to 150, 206.44 and 123.56 is: 170.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    150 : 206.44 = 123.56 : x
  2. Step 2: Convert to fraction form
    150/206.44 = 123.56/x
  3. Step 3: Cross multiply
    150x = 206.44 × 123.56
  4. Step 4: Simplify right side
    150x = 25,507.73
  5. Step 5: Solve for x
    x = 25,507.73/150
  6. Step 6: Final answer
    x = 170.05

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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.