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Finding the Fourth Proportional to 159.34, 239.51 and 105.58

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Solution

The fourth proportional to 159.34, 239.51 and 105.58 is: 158.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.34 : 239.51 = 105.58 : x
  2. Step 2: Convert to fraction form
    159.34/239.51 = 105.58/x
  3. Step 3: Cross multiply
    159.34x = 239.51 × 105.58
  4. Step 4: Simplify right side
    159.34x = 25,287.47
  5. Step 5: Solve for x
    x = 25,287.47/159.34
  6. Step 6: Final answer
    x = 158.70

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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.