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Finding the Fourth Proportional to 180.20, 270.26 and 87.65

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Solution

The fourth proportional to 180.20, 270.26 and 87.65 is: 131.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.20 : 270.26 = 87.65 : x
  2. Step 2: Convert to fraction form
    180.20/270.26 = 87.65/x
  3. Step 3: Cross multiply
    180.20x = 270.26 × 87.65
  4. Step 4: Simplify right side
    180.20x = 23,688.10
  5. Step 5: Solve for x
    x = 23,688.10/180.20
  6. Step 6: Final answer
    x = 131.45

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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.