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Finding the Fourth Proportional to 109.42, 163.22 and 107.35

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Solution

The fourth proportional to 109.42, 163.22 and 107.35 is: 160.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.42 : 163.22 = 107.35 : x
  2. Step 2: Convert to fraction form
    109.42/163.22 = 107.35/x
  3. Step 3: Cross multiply
    109.42x = 163.22 × 107.35
  4. Step 4: Simplify right side
    109.42x = 17,520.72
  5. Step 5: Solve for x
    x = 17,520.72/109.42
  6. Step 6: Final answer
    x = 160.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.