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Finding the Fourth Proportional to 173.20, 238.98 and 131.80

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Solution

The fourth proportional to 173.20, 238.98 and 131.80 is: 181.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.20 : 238.98 = 131.80 : x
  2. Step 2: Convert to fraction form
    173.20/238.98 = 131.80/x
  3. Step 3: Cross multiply
    173.20x = 238.98 × 131.80
  4. Step 4: Simplify right side
    173.20x = 31,497.56
  5. Step 5: Solve for x
    x = 31,497.56/173.20
  6. Step 6: Final answer
    x = 181.86

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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.