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Finding the Fourth Proportional to 159.71, 238.88 and 118.70

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Solution

The fourth proportional to 159.71, 238.88 and 118.70 is: 177.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.71 : 238.88 = 118.70 : x
  2. Step 2: Convert to fraction form
    159.71/238.88 = 118.70/x
  3. Step 3: Cross multiply
    159.71x = 238.88 × 118.70
  4. Step 4: Simplify right side
    159.71x = 28,355.06
  5. Step 5: Solve for x
    x = 28,355.06/159.71
  6. Step 6: Final answer
    x = 177.54

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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.