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Finding the Fourth Proportional to 102.12, 153.26 and 38

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Solution

The fourth proportional to 102.12, 153.26 and 38 is: 57.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.12 : 153.26 = 38 : x
  2. Step 2: Convert to fraction form
    102.12/153.26 = 38/x
  3. Step 3: Cross multiply
    102.12x = 153.26 × 38
  4. Step 4: Simplify right side
    102.12x = 5,823.88
  5. Step 5: Solve for x
    x = 5,823.88/102.12
  6. Step 6: Final answer
    x = 57.03

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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.