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Finding the Fourth Proportional to 139.92, 192.60 and 103.02

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Solution

The fourth proportional to 139.92, 192.60 and 103.02 is: 141.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.92 : 192.60 = 103.02 : x
  2. Step 2: Convert to fraction form
    139.92/192.60 = 103.02/x
  3. Step 3: Cross multiply
    139.92x = 192.60 × 103.02
  4. Step 4: Simplify right side
    139.92x = 19,841.65
  5. Step 5: Solve for x
    x = 19,841.65/139.92
  6. Step 6: Final answer
    x = 141.81

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