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Finding the Fourth Proportional to 231.12, 318.96 and 127.62

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Solution

The fourth proportional to 231.12, 318.96 and 127.62 is: 176.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.12 : 318.96 = 127.62 : x
  2. Step 2: Convert to fraction form
    231.12/318.96 = 127.62/x
  3. Step 3: Cross multiply
    231.12x = 318.96 × 127.62
  4. Step 4: Simplify right side
    231.12x = 40,705.68
  5. Step 5: Solve for x
    x = 40,705.68/231.12
  6. Step 6: Final answer
    x = 176.12

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.