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Finding the Fourth Proportional to 102.76, 154.18 and 41.89

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Solution

The fourth proportional to 102.76, 154.18 and 41.89 is: 62.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.76 : 154.18 = 41.89 : x
  2. Step 2: Convert to fraction form
    102.76/154.18 = 41.89/x
  3. Step 3: Cross multiply
    102.76x = 154.18 × 41.89
  4. Step 4: Simplify right side
    102.76x = 6,458.60
  5. Step 5: Solve for x
    x = 6,458.60/102.76
  6. Step 6: Final answer
    x = 62.85

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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.