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Finding the Fourth Proportional to 141.14, 211.62 and 115.40

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Solution

The fourth proportional to 141.14, 211.62 and 115.40 is: 173.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.14 : 211.62 = 115.40 : x
  2. Step 2: Convert to fraction form
    141.14/211.62 = 115.40/x
  3. Step 3: Cross multiply
    141.14x = 211.62 × 115.40
  4. Step 4: Simplify right side
    141.14x = 24,420.95
  5. Step 5: Solve for x
    x = 24,420.95/141.14
  6. Step 6: Final answer
    x = 173.03

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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.