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Finding the Fourth Proportional to 141.17, 209.25 and 138.98

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Solution

The fourth proportional to 141.17, 209.25 and 138.98 is: 206.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.17 : 209.25 = 138.98 : x
  2. Step 2: Convert to fraction form
    141.17/209.25 = 138.98/x
  3. Step 3: Cross multiply
    141.17x = 209.25 × 138.98
  4. Step 4: Simplify right side
    141.17x = 29,082.09
  5. Step 5: Solve for x
    x = 29,082.09/141.17
  6. Step 6: Final answer
    x = 206.01

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.