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Finding the Fourth Proportional to 111.29, 166.93 and 39.13

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Solution

The fourth proportional to 111.29, 166.93 and 39.13 is: 58.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.29 : 166.93 = 39.13 : x
  2. Step 2: Convert to fraction form
    111.29/166.93 = 39.13/x
  3. Step 3: Cross multiply
    111.29x = 166.93 × 39.13
  4. Step 4: Simplify right side
    111.29x = 6,531.46
  5. Step 5: Solve for x
    x = 6,531.46/111.29
  6. Step 6: Final answer
    x = 58.69

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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.