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Finding the Fourth Proportional to 180.99, 271.28 and 72.77

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Solution

The fourth proportional to 180.99, 271.28 and 72.77 is: 109.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.99 : 271.28 = 72.77 : x
  2. Step 2: Convert to fraction form
    180.99/271.28 = 72.77/x
  3. Step 3: Cross multiply
    180.99x = 271.28 × 72.77
  4. Step 4: Simplify right side
    180.99x = 19,739.87
  5. Step 5: Solve for x
    x = 19,739.87/180.99
  6. Step 6: Final answer
    x = 109.07

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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.