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Finding the Fourth Proportional to 180.47, 270.72 and 89.11

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Solution

The fourth proportional to 180.47, 270.72 and 89.11 is: 133.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.47 : 270.72 = 89.11 : x
  2. Step 2: Convert to fraction form
    180.47/270.72 = 89.11/x
  3. Step 3: Cross multiply
    180.47x = 270.72 × 89.11
  4. Step 4: Simplify right side
    180.47x = 24,124.33
  5. Step 5: Solve for x
    x = 24,124.33/180.47
  6. Step 6: Final answer
    x = 133.68

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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.