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Finding the Fourth Proportional to 179.21, 268.63 and 70.85

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Solution

The fourth proportional to 179.21, 268.63 and 70.85 is: 106.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.21 : 268.63 = 70.85 : x
  2. Step 2: Convert to fraction form
    179.21/268.63 = 70.85/x
  3. Step 3: Cross multiply
    179.21x = 268.63 × 70.85
  4. Step 4: Simplify right side
    179.21x = 19,032.44
  5. Step 5: Solve for x
    x = 19,032.44/179.21
  6. Step 6: Final answer
    x = 106.20

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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.