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Finding the Fourth Proportional to 154.12, 212.88 and 133.60

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Solution

The fourth proportional to 154.12, 212.88 and 133.60 is: 184.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.12 : 212.88 = 133.60 : x
  2. Step 2: Convert to fraction form
    154.12/212.88 = 133.60/x
  3. Step 3: Cross multiply
    154.12x = 212.88 × 133.60
  4. Step 4: Simplify right side
    154.12x = 28,440.77
  5. Step 5: Solve for x
    x = 28,440.77/154.12
  6. Step 6: Final answer
    x = 184.54

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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.