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Finding the Fourth Proportional to 139.96, 193.11 and 93.36

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Solution

The fourth proportional to 139.96, 193.11 and 93.36 is: 128.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.96 : 193.11 = 93.36 : x
  2. Step 2: Convert to fraction form
    139.96/193.11 = 93.36/x
  3. Step 3: Cross multiply
    139.96x = 193.11 × 93.36
  4. Step 4: Simplify right side
    139.96x = 18,028.75
  5. Step 5: Solve for x
    x = 18,028.75/139.96
  6. Step 6: Final answer
    x = 128.81

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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.