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Finding the Fourth Proportional to 139.95, 192.65 and 126.27

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Solution

The fourth proportional to 139.95, 192.65 and 126.27 is: 173.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.95 : 192.65 = 126.27 : x
  2. Step 2: Convert to fraction form
    139.95/192.65 = 126.27/x
  3. Step 3: Cross multiply
    139.95x = 192.65 × 126.27
  4. Step 4: Simplify right side
    139.95x = 24,325.28
  5. Step 5: Solve for x
    x = 24,325.28/139.95
  6. Step 6: Final answer
    x = 173.81

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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.