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Finding the Fourth Proportional to 141.55, 211.79 and 83.56

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Solution

The fourth proportional to 141.55, 211.79 and 83.56 is: 125.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.55 : 211.79 = 83.56 : x
  2. Step 2: Convert to fraction form
    141.55/211.79 = 83.56/x
  3. Step 3: Cross multiply
    141.55x = 211.79 × 83.56
  4. Step 4: Simplify right side
    141.55x = 17,696.42
  5. Step 5: Solve for x
    x = 17,696.42/141.55
  6. Step 6: Final answer
    x = 125.02

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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.