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Finding the Fourth Proportional to 163.63, 225.61 and 149.86

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Solution

The fourth proportional to 163.63, 225.61 and 149.86 is: 206.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.63 : 225.61 = 149.86 : x
  2. Step 2: Convert to fraction form
    163.63/225.61 = 149.86/x
  3. Step 3: Cross multiply
    163.63x = 225.61 × 149.86
  4. Step 4: Simplify right side
    163.63x = 33,809.91
  5. Step 5: Solve for x
    x = 33,809.91/163.63
  6. Step 6: Final answer
    x = 206.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.