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Finding the Fourth Proportional to 150.99, 226.49 and 78.86

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Solution

The fourth proportional to 150.99, 226.49 and 78.86 is: 118.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.99 : 226.49 = 78.86 : x
  2. Step 2: Convert to fraction form
    150.99/226.49 = 78.86/x
  3. Step 3: Cross multiply
    150.99x = 226.49 × 78.86
  4. Step 4: Simplify right side
    150.99x = 17,859.47
  5. Step 5: Solve for x
    x = 17,859.47/150.99
  6. Step 6: Final answer
    x = 118.28

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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.