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Finding the Fourth Proportional to 154.12, 212.55 and 133.33

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Solution

The fourth proportional to 154.12, 212.55 and 133.33 is: 183.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.12 : 212.55 = 133.33 : x
  2. Step 2: Convert to fraction form
    154.12/212.55 = 133.33/x
  3. Step 3: Cross multiply
    154.12x = 212.55 × 133.33
  4. Step 4: Simplify right side
    154.12x = 28,339.29
  5. Step 5: Solve for x
    x = 28,339.29/154.12
  6. Step 6: Final answer
    x = 183.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.