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Finding the Fourth Proportional to 150.59, 225.52 and 128.75

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Solution

The fourth proportional to 150.59, 225.52 and 128.75 is: 192.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.59 : 225.52 = 128.75 : x
  2. Step 2: Convert to fraction form
    150.59/225.52 = 128.75/x
  3. Step 3: Cross multiply
    150.59x = 225.52 × 128.75
  4. Step 4: Simplify right side
    150.59x = 29,035.70
  5. Step 5: Solve for x
    x = 29,035.70/150.59
  6. Step 6: Final answer
    x = 192.81

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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.