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Finding the Fourth Proportional to 150.12, 225.12 and 68.94

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Solution

The fourth proportional to 150.12, 225.12 and 68.94 is: 103.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.12 : 225.12 = 68.94 : x
  2. Step 2: Convert to fraction form
    150.12/225.12 = 68.94/x
  3. Step 3: Cross multiply
    150.12x = 225.12 × 68.94
  4. Step 4: Simplify right side
    150.12x = 15,519.77
  5. Step 5: Solve for x
    x = 15,519.77/150.12
  6. Step 6: Final answer
    x = 103.38

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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.