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Finding the Fourth Proportional to 140.50, 193.84 and 91.41

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Solution

The fourth proportional to 140.50, 193.84 and 91.41 is: 126.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.50 : 193.84 = 91.41 : x
  2. Step 2: Convert to fraction form
    140.50/193.84 = 91.41/x
  3. Step 3: Cross multiply
    140.50x = 193.84 × 91.41
  4. Step 4: Simplify right side
    140.50x = 17,718.91
  5. Step 5: Solve for x
    x = 17,718.91/140.50
  6. Step 6: Final answer
    x = 126.11

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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.