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Finding the Fourth Proportional to 180.35, 270.55 and 72.11

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Solution

The fourth proportional to 180.35, 270.55 and 72.11 is: 108.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.35 : 270.55 = 72.11 : x
  2. Step 2: Convert to fraction form
    180.35/270.55 = 72.11/x
  3. Step 3: Cross multiply
    180.35x = 270.55 × 72.11
  4. Step 4: Simplify right side
    180.35x = 19,509.36
  5. Step 5: Solve for x
    x = 19,509.36/180.35
  6. Step 6: Final answer
    x = 108.17

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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.