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Finding the Fourth Proportional to 141.73, 212.55 and 68.58

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Solution

The fourth proportional to 141.73, 212.55 and 68.58 is: 102.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.73 : 212.55 = 68.58 : x
  2. Step 2: Convert to fraction form
    141.73/212.55 = 68.58/x
  3. Step 3: Cross multiply
    141.73x = 212.55 × 68.58
  4. Step 4: Simplify right side
    141.73x = 14,576.68
  5. Step 5: Solve for x
    x = 14,576.68/141.73
  6. Step 6: Final answer
    x = 102.85

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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.