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Finding the Fourth Proportional to 131.50, 181.33 and 118.41

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Solution

The fourth proportional to 131.50, 181.33 and 118.41 is: 163.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.50 : 181.33 = 118.41 : x
  2. Step 2: Convert to fraction form
    131.50/181.33 = 118.41/x
  3. Step 3: Cross multiply
    131.50x = 181.33 × 118.41
  4. Step 4: Simplify right side
    131.50x = 21,471.29
  5. Step 5: Solve for x
    x = 21,471.29/131.50
  6. Step 6: Final answer
    x = 163.28

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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.