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Finding the Fourth Proportional to 150.86, 226.39 and 78.77

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Solution

The fourth proportional to 150.86, 226.39 and 78.77 is: 118.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.86 : 226.39 = 78.77 : x
  2. Step 2: Convert to fraction form
    150.86/226.39 = 78.77/x
  3. Step 3: Cross multiply
    150.86x = 226.39 × 78.77
  4. Step 4: Simplify right side
    150.86x = 17,832.74
  5. Step 5: Solve for x
    x = 17,832.74/150.86
  6. Step 6: Final answer
    x = 118.21

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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.