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Finding the Fourth Proportional to 179.81, 269.81 and 71.60

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Solution

The fourth proportional to 179.81, 269.81 and 71.60 is: 107.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.81 : 269.81 = 71.60 : x
  2. Step 2: Convert to fraction form
    179.81/269.81 = 71.60/x
  3. Step 3: Cross multiply
    179.81x = 269.81 × 71.60
  4. Step 4: Simplify right side
    179.81x = 19,316.69
  5. Step 5: Solve for x
    x = 19,316.69/179.81
  6. Step 6: Final answer
    x = 107.43

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.