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Finding the Fourth Proportional to 154.04, 231.15 and 121.64

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Solution

The fourth proportional to 154.04, 231.15 and 121.64 is: 182.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.04 : 231.15 = 121.64 : x
  2. Step 2: Convert to fraction form
    154.04/231.15 = 121.64/x
  3. Step 3: Cross multiply
    154.04x = 231.15 × 121.64
  4. Step 4: Simplify right side
    154.04x = 28,117.09
  5. Step 5: Solve for x
    x = 28,117.09/154.04
  6. Step 6: Final answer
    x = 182.53

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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.