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Finding the Fourth Proportional to 105.94, 146.22 and 67.12

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Solution

The fourth proportional to 105.94, 146.22 and 67.12 is: 92.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.94 : 146.22 = 67.12 : x
  2. Step 2: Convert to fraction form
    105.94/146.22 = 67.12/x
  3. Step 3: Cross multiply
    105.94x = 146.22 × 67.12
  4. Step 4: Simplify right side
    105.94x = 9,814.29
  5. Step 5: Solve for x
    x = 9,814.29/105.94
  6. Step 6: Final answer
    x = 92.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.