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Finding the Fourth Proportional to 180.02, 269.87 and 71.72

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Solution

The fourth proportional to 180.02, 269.87 and 71.72 is: 107.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.02 : 269.87 = 71.72 : x
  2. Step 2: Convert to fraction form
    180.02/269.87 = 71.72/x
  3. Step 3: Cross multiply
    180.02x = 269.87 × 71.72
  4. Step 4: Simplify right side
    180.02x = 19,354.38
  5. Step 5: Solve for x
    x = 19,354.38/180.02
  6. Step 6: Final answer
    x = 107.51

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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.