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Finding the Fourth Proportional to 193.40, 266.76 and 131.21

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Solution

The fourth proportional to 193.40, 266.76 and 131.21 is: 180.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.40 : 266.76 = 131.21 : x
  2. Step 2: Convert to fraction form
    193.40/266.76 = 131.21/x
  3. Step 3: Cross multiply
    193.40x = 266.76 × 131.21
  4. Step 4: Simplify right side
    193.40x = 35,001.58
  5. Step 5: Solve for x
    x = 35,001.58/193.40
  6. Step 6: Final answer
    x = 180.98

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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.