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Finding the Fourth Proportional to 102.95, 154.43 and 30.82

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Solution

The fourth proportional to 102.95, 154.43 and 30.82 is: 46.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.95 : 154.43 = 30.82 : x
  2. Step 2: Convert to fraction form
    102.95/154.43 = 30.82/x
  3. Step 3: Cross multiply
    102.95x = 154.43 × 30.82
  4. Step 4: Simplify right side
    102.95x = 4,759.53
  5. Step 5: Solve for x
    x = 4,759.53/102.95
  6. Step 6: Final answer
    x = 46.23

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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.