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Finding the Fourth Proportional to 106.42, 146.80 and 67.63

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Solution

The fourth proportional to 106.42, 146.80 and 67.63 is: 93.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.42 : 146.80 = 67.63 : x
  2. Step 2: Convert to fraction form
    106.42/146.80 = 67.63/x
  3. Step 3: Cross multiply
    106.42x = 146.80 × 67.63
  4. Step 4: Simplify right side
    106.42x = 9,928.08
  5. Step 5: Solve for x
    x = 9,928.08/106.42
  6. Step 6: Final answer
    x = 93.29

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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.