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Finding the Fourth Proportional to 150.45, 207.72 and 122.89

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Solution

The fourth proportional to 150.45, 207.72 and 122.89 is: 169.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.45 : 207.72 = 122.89 : x
  2. Step 2: Convert to fraction form
    150.45/207.72 = 122.89/x
  3. Step 3: Cross multiply
    150.45x = 207.72 × 122.89
  4. Step 4: Simplify right side
    150.45x = 25,525.36
  5. Step 5: Solve for x
    x = 25,525.36/150.45
  6. Step 6: Final answer
    x = 169.66

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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.