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Finding the Fourth Proportional to 141.55, 211.96 and 118.66

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Solution

The fourth proportional to 141.55, 211.96 and 118.66 is: 177.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.55 : 211.96 = 118.66 : x
  2. Step 2: Convert to fraction form
    141.55/211.96 = 118.66/x
  3. Step 3: Cross multiply
    141.55x = 211.96 × 118.66
  4. Step 4: Simplify right side
    141.55x = 25,150.58
  5. Step 5: Solve for x
    x = 25,150.58/141.55
  6. Step 6: Final answer
    x = 177.69

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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.