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Finding the Fourth Proportional to 150.30, 225.28 and 81.86

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Solution

The fourth proportional to 150.30, 225.28 and 81.86 is: 122.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.30 : 225.28 = 81.86 : x
  2. Step 2: Convert to fraction form
    150.30/225.28 = 81.86/x
  3. Step 3: Cross multiply
    150.30x = 225.28 × 81.86
  4. Step 4: Simplify right side
    150.30x = 18,440.09
  5. Step 5: Solve for x
    x = 18,440.09/150.30
  6. Step 6: Final answer
    x = 122.69

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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.