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Finding the Fourth Proportional to 154.39, 231.47 and 73.19

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Solution

The fourth proportional to 154.39, 231.47 and 73.19 is: 109.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.39 : 231.47 = 73.19 : x
  2. Step 2: Convert to fraction form
    154.39/231.47 = 73.19/x
  3. Step 3: Cross multiply
    154.39x = 231.47 × 73.19
  4. Step 4: Simplify right side
    154.39x = 16,940.13
  5. Step 5: Solve for x
    x = 16,940.13/154.39
  6. Step 6: Final answer
    x = 109.72

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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.