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Finding the Fourth Proportional to 179.17, 268.80 and 139.09

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Solution

The fourth proportional to 179.17, 268.80 and 139.09 is: 208.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.17 : 268.80 = 139.09 : x
  2. Step 2: Convert to fraction form
    179.17/268.80 = 139.09/x
  3. Step 3: Cross multiply
    179.17x = 268.80 × 139.09
  4. Step 4: Simplify right side
    179.17x = 37,387.39
  5. Step 5: Solve for x
    x = 37,387.39/179.17
  6. Step 6: Final answer
    x = 208.67

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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.