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Finding the Fourth Proportional to 150.71, 226.15 and 85.80

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Solution

The fourth proportional to 150.71, 226.15 and 85.80 is: 128.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.71 : 226.15 = 85.80 : x
  2. Step 2: Convert to fraction form
    150.71/226.15 = 85.80/x
  3. Step 3: Cross multiply
    150.71x = 226.15 × 85.80
  4. Step 4: Simplify right side
    150.71x = 19,403.76
  5. Step 5: Solve for x
    x = 19,403.76/150.71
  6. Step 6: Final answer
    x = 128.75

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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.