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Finding the Fourth Proportional to 180.79, 271.26 and 72.55

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Solution

The fourth proportional to 180.79, 271.26 and 72.55 is: 108.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.79 : 271.26 = 72.55 : x
  2. Step 2: Convert to fraction form
    180.79/271.26 = 72.55/x
  3. Step 3: Cross multiply
    180.79x = 271.26 × 72.55
  4. Step 4: Simplify right side
    180.79x = 19,679.91
  5. Step 5: Solve for x
    x = 19,679.91/180.79
  6. Step 6: Final answer
    x = 108.86

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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.