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Finding the Fourth Proportional to 159.99, 239.99 and 137.31

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Solution

The fourth proportional to 159.99, 239.99 and 137.31 is: 205.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.99 : 239.99 = 137.31 : x
  2. Step 2: Convert to fraction form
    159.99/239.99 = 137.31/x
  3. Step 3: Cross multiply
    159.99x = 239.99 × 137.31
  4. Step 4: Simplify right side
    159.99x = 32,952.34
  5. Step 5: Solve for x
    x = 32,952.34/159.99
  6. Step 6: Final answer
    x = 205.97

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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.