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Finding the Fourth Proportional to 154.59, 231.63 and 109.23

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Solution

The fourth proportional to 154.59, 231.63 and 109.23 is: 163.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.59 : 231.63 = 109.23 : x
  2. Step 2: Convert to fraction form
    154.59/231.63 = 109.23/x
  3. Step 3: Cross multiply
    154.59x = 231.63 × 109.23
  4. Step 4: Simplify right side
    154.59x = 25,300.94
  5. Step 5: Solve for x
    x = 25,300.94/154.59
  6. Step 6: Final answer
    x = 163.66

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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.