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Finding the Fourth Proportional to 234.74, 352.10 and 78.57

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Solution

The fourth proportional to 234.74, 352.10 and 78.57 is: 117.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.74 : 352.10 = 78.57 : x
  2. Step 2: Convert to fraction form
    234.74/352.10 = 78.57/x
  3. Step 3: Cross multiply
    234.74x = 352.10 × 78.57
  4. Step 4: Simplify right side
    234.74x = 27,664.50
  5. Step 5: Solve for x
    x = 27,664.50/234.74
  6. Step 6: Final answer
    x = 117.85

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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.