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Finding the Fourth Proportional to 141.46, 211.94 and 86.52

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Solution

The fourth proportional to 141.46, 211.94 and 86.52 is: 129.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.46 : 211.94 = 86.52 : x
  2. Step 2: Convert to fraction form
    141.46/211.94 = 86.52/x
  3. Step 3: Cross multiply
    141.46x = 211.94 × 86.52
  4. Step 4: Simplify right side
    141.46x = 18,337.05
  5. Step 5: Solve for x
    x = 18,337.05/141.46
  6. Step 6: Final answer
    x = 129.63

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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.