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Finding the Fourth Proportional to 141.67, 212.37 and 76.63

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Solution

The fourth proportional to 141.67, 212.37 and 76.63 is: 114.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.67 : 212.37 = 76.63 : x
  2. Step 2: Convert to fraction form
    141.67/212.37 = 76.63/x
  3. Step 3: Cross multiply
    141.67x = 212.37 × 76.63
  4. Step 4: Simplify right side
    141.67x = 16,273.91
  5. Step 5: Solve for x
    x = 16,273.91/141.67
  6. Step 6: Final answer
    x = 114.87

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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.