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Finding the Fourth Proportional to 159.35, 239.07 and 72.68

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Solution

The fourth proportional to 159.35, 239.07 and 72.68 is: 109.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.35 : 239.07 = 72.68 : x
  2. Step 2: Convert to fraction form
    159.35/239.07 = 72.68/x
  3. Step 3: Cross multiply
    159.35x = 239.07 × 72.68
  4. Step 4: Simplify right side
    159.35x = 17,374.41
  5. Step 5: Solve for x
    x = 17,374.41/159.35
  6. Step 6: Final answer
    x = 109.04

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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.