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Finding the Fourth Proportional to 151.19, 226.42 and 78.88

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Solution

The fourth proportional to 151.19, 226.42 and 78.88 is: 118.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.19 : 226.42 = 78.88 : x
  2. Step 2: Convert to fraction form
    151.19/226.42 = 78.88/x
  3. Step 3: Cross multiply
    151.19x = 226.42 × 78.88
  4. Step 4: Simplify right side
    151.19x = 17,860.01
  5. Step 5: Solve for x
    x = 17,860.01/151.19
  6. Step 6: Final answer
    x = 118.13

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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.