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Finding the Fourth Proportional to 131.27, 180.63 and 122.36

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Solution

The fourth proportional to 131.27, 180.63 and 122.36 is: 168.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.27 : 180.63 = 122.36 : x
  2. Step 2: Convert to fraction form
    131.27/180.63 = 122.36/x
  3. Step 3: Cross multiply
    131.27x = 180.63 × 122.36
  4. Step 4: Simplify right side
    131.27x = 22,100.98
  5. Step 5: Solve for x
    x = 22,100.98/131.27
  6. Step 6: Final answer
    x = 168.37

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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.