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Finding the Fourth Proportional to 105.45, 158.22 and 75.26

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Solution

The fourth proportional to 105.45, 158.22 and 75.26 is: 112.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.45 : 158.22 = 75.26 : x
  2. Step 2: Convert to fraction form
    105.45/158.22 = 75.26/x
  3. Step 3: Cross multiply
    105.45x = 158.22 × 75.26
  4. Step 4: Simplify right side
    105.45x = 11,907.14
  5. Step 5: Solve for x
    x = 11,907.14/105.45
  6. Step 6: Final answer
    x = 112.91

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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.