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Finding the Fourth Proportional to 111.50, 166.95 and 75.26

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Solution

The fourth proportional to 111.50, 166.95 and 75.26 is: 112.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.50 : 166.95 = 75.26 : x
  2. Step 2: Convert to fraction form
    111.50/166.95 = 75.26/x
  3. Step 3: Cross multiply
    111.50x = 166.95 × 75.26
  4. Step 4: Simplify right side
    111.50x = 12,564.66
  5. Step 5: Solve for x
    x = 12,564.66/111.50
  6. Step 6: Final answer
    x = 112.69

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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.