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Finding the Fourth Proportional to 141.07, 211.30 and 92.20

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Solution

The fourth proportional to 141.07, 211.30 and 92.20 is: 138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.07 : 211.30 = 92.20 : x
  2. Step 2: Convert to fraction form
    141.07/211.30 = 92.20/x
  3. Step 3: Cross multiply
    141.07x = 211.30 × 92.20
  4. Step 4: Simplify right side
    141.07x = 19,481.86
  5. Step 5: Solve for x
    x = 19,481.86/141.07
  6. Step 6: Final answer
    x = 138.10

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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.