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Finding the Fourth Proportional to 234.54, 351.74 and 72.18

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Solution

The fourth proportional to 234.54, 351.74 and 72.18 is: 108.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.54 : 351.74 = 72.18 : x
  2. Step 2: Convert to fraction form
    234.54/351.74 = 72.18/x
  3. Step 3: Cross multiply
    234.54x = 351.74 × 72.18
  4. Step 4: Simplify right side
    234.54x = 25,388.23
  5. Step 5: Solve for x
    x = 25,388.23/234.54
  6. Step 6: Final answer
    x = 108.25

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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.