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Finding the Fourth Proportional to 109.11, 162.74 and 107.29

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Solution

The fourth proportional to 109.11, 162.74 and 107.29 is: 160.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.11 : 162.74 = 107.29 : x
  2. Step 2: Convert to fraction form
    109.11/162.74 = 107.29/x
  3. Step 3: Cross multiply
    109.11x = 162.74 × 107.29
  4. Step 4: Simplify right side
    109.11x = 17,459.43
  5. Step 5: Solve for x
    x = 17,459.43/109.11
  6. Step 6: Final answer
    x = 160.02

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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.