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Finding the Fourth Proportional to 154.01, 231.91 and 113.71

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Solution

The fourth proportional to 154.01, 231.91 and 113.71 is: 171.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.01 : 231.91 = 113.71 : x
  2. Step 2: Convert to fraction form
    154.01/231.91 = 113.71/x
  3. Step 3: Cross multiply
    154.01x = 231.91 × 113.71
  4. Step 4: Simplify right side
    154.01x = 26,369.34
  5. Step 5: Solve for x
    x = 26,369.34/154.01
  6. Step 6: Final answer
    x = 171.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.