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Finding the Fourth Proportional to 179.65, 269.48 and 71.43

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Solution

The fourth proportional to 179.65, 269.48 and 71.43 is: 107.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.65 : 269.48 = 71.43 : x
  2. Step 2: Convert to fraction form
    179.65/269.48 = 71.43/x
  3. Step 3: Cross multiply
    179.65x = 269.48 × 71.43
  4. Step 4: Simplify right side
    179.65x = 19,248.96
  5. Step 5: Solve for x
    x = 19,248.96/179.65
  6. Step 6: Final answer
    x = 107.15

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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.