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Finding the Fourth Proportional to 159, 239.72 and 127.32

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Solution

The fourth proportional to 159, 239.72 and 127.32 is: 191.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    159 : 239.72 = 127.32 : x
  2. Step 2: Convert to fraction form
    159/239.72 = 127.32/x
  3. Step 3: Cross multiply
    159x = 239.72 × 127.32
  4. Step 4: Simplify right side
    159x = 30,521.15
  5. Step 5: Solve for x
    x = 30,521.15/159
  6. Step 6: Final answer
    x = 191.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.