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Finding the Fourth Proportional to 141.71, 211.40 and 131.89

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Solution

The fourth proportional to 141.71, 211.40 and 131.89 is: 196.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.71 : 211.40 = 131.89 : x
  2. Step 2: Convert to fraction form
    141.71/211.40 = 131.89/x
  3. Step 3: Cross multiply
    141.71x = 211.40 × 131.89
  4. Step 4: Simplify right side
    141.71x = 27,881.55
  5. Step 5: Solve for x
    x = 27,881.55/141.71
  6. Step 6: Final answer
    x = 196.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.