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Finding the Fourth Proportional to 150.91, 225.96 and 99.39

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Solution

The fourth proportional to 150.91, 225.96 and 99.39 is: 148.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.91 : 225.96 = 99.39 : x
  2. Step 2: Convert to fraction form
    150.91/225.96 = 99.39/x
  3. Step 3: Cross multiply
    150.91x = 225.96 × 99.39
  4. Step 4: Simplify right side
    150.91x = 22,458.64
  5. Step 5: Solve for x
    x = 22,458.64/150.91
  6. Step 6: Final answer
    x = 148.82

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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.