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Finding the Fourth Proportional to 139.67, 192.60 and 119.02

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Solution

The fourth proportional to 139.67, 192.60 and 119.02 is: 164.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.67 : 192.60 = 119.02 : x
  2. Step 2: Convert to fraction form
    139.67/192.60 = 119.02/x
  3. Step 3: Cross multiply
    139.67x = 192.60 × 119.02
  4. Step 4: Simplify right side
    139.67x = 22,923.25
  5. Step 5: Solve for x
    x = 22,923.25/139.67
  6. Step 6: Final answer
    x = 164.12

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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.