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Finding the Fourth Proportional to 92.29, 138.34 and 34.48

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Solution

The fourth proportional to 92.29, 138.34 and 34.48 is: 51.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.29 : 138.34 = 34.48 : x
  2. Step 2: Convert to fraction form
    92.29/138.34 = 34.48/x
  3. Step 3: Cross multiply
    92.29x = 138.34 × 34.48
  4. Step 4: Simplify right side
    92.29x = 4,769.21
  5. Step 5: Solve for x
    x = 4,769.21/92.29
  6. Step 6: Final answer
    x = 51.68

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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.