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Finding the Fourth Proportional to 140.27, 192.43 and 137.21

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Solution

The fourth proportional to 140.27, 192.43 and 137.21 is: 188.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.27 : 192.43 = 137.21 : x
  2. Step 2: Convert to fraction form
    140.27/192.43 = 137.21/x
  3. Step 3: Cross multiply
    140.27x = 192.43 × 137.21
  4. Step 4: Simplify right side
    140.27x = 26,403.32
  5. Step 5: Solve for x
    x = 26,403.32/140.27
  6. Step 6: Final answer
    x = 188.23

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.