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Finding the Fourth Proportional to 159.05, 238.10 and 117.81

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Solution

The fourth proportional to 159.05, 238.10 and 117.81 is: 176.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.05 : 238.10 = 117.81 : x
  2. Step 2: Convert to fraction form
    159.05/238.10 = 117.81/x
  3. Step 3: Cross multiply
    159.05x = 238.10 × 117.81
  4. Step 4: Simplify right side
    159.05x = 28,049.97
  5. Step 5: Solve for x
    x = 28,049.97/159.05
  6. Step 6: Final answer
    x = 176.37

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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.