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Finding the Fourth Proportional to 235.14, 352.69 and 72.81

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Solution

The fourth proportional to 235.14, 352.69 and 72.81 is: 109.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.14 : 352.69 = 72.81 : x
  2. Step 2: Convert to fraction form
    235.14/352.69 = 72.81/x
  3. Step 3: Cross multiply
    235.14x = 352.69 × 72.81
  4. Step 4: Simplify right side
    235.14x = 25,679.36
  5. Step 5: Solve for x
    x = 25,679.36/235.14
  6. Step 6: Final answer
    x = 109.21

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Why These Related Problems?

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