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Finding the Fourth Proportional to 179.94, 269.62 and 87.28

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Solution

The fourth proportional to 179.94, 269.62 and 87.28 is: 130.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.94 : 269.62 = 87.28 : x
  2. Step 2: Convert to fraction form
    179.94/269.62 = 87.28/x
  3. Step 3: Cross multiply
    179.94x = 269.62 × 87.28
  4. Step 4: Simplify right side
    179.94x = 23,532.43
  5. Step 5: Solve for x
    x = 23,532.43/179.94
  6. Step 6: Final answer
    x = 130.78

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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.