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Finding the Fourth Proportional to 102.41, 141.26 and 71.31

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Solution

The fourth proportional to 102.41, 141.26 and 71.31 is: 98.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.41 : 141.26 = 71.31 : x
  2. Step 2: Convert to fraction form
    102.41/141.26 = 71.31/x
  3. Step 3: Cross multiply
    102.41x = 141.26 × 71.31
  4. Step 4: Simplify right side
    102.41x = 10,073.25
  5. Step 5: Solve for x
    x = 10,073.25/102.41
  6. Step 6: Final answer
    x = 98.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.