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Finding the Fourth Proportional to 72.11, 108.11 and 35.53

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Solution

The fourth proportional to 72.11, 108.11 and 35.53 is: 53.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.11 : 108.11 = 35.53 : x
  2. Step 2: Convert to fraction form
    72.11/108.11 = 35.53/x
  3. Step 3: Cross multiply
    72.11x = 108.11 × 35.53
  4. Step 4: Simplify right side
    72.11x = 3,841.15
  5. Step 5: Solve for x
    x = 3,841.15/72.11
  6. Step 6: Final answer
    x = 53.27

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.