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Finding the Fourth Proportional to 159.27, 238.60 and 78.07

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Solution

The fourth proportional to 159.27, 238.60 and 78.07 is: 116.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.27 : 238.60 = 78.07 : x
  2. Step 2: Convert to fraction form
    159.27/238.60 = 78.07/x
  3. Step 3: Cross multiply
    159.27x = 238.60 × 78.07
  4. Step 4: Simplify right side
    159.27x = 18,625.92
  5. Step 5: Solve for x
    x = 18,625.92/159.27
  6. Step 6: Final answer
    x = 116.95

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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.