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Finding the Fourth Proportional to 159.48, 239.16 and 126.72

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Solution

The fourth proportional to 159.48, 239.16 and 126.72 is: 190.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.48 : 239.16 = 126.72 : x
  2. Step 2: Convert to fraction form
    159.48/239.16 = 126.72/x
  3. Step 3: Cross multiply
    159.48x = 239.16 × 126.72
  4. Step 4: Simplify right side
    159.48x = 30,306.36
  5. Step 5: Solve for x
    x = 30,306.36/159.48
  6. Step 6: Final answer
    x = 190.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.