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Finding the Fourth Proportional to 163.62, 225.80 and 89.94

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Solution

The fourth proportional to 163.62, 225.80 and 89.94 is: 124.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.62 : 225.80 = 89.94 : x
  2. Step 2: Convert to fraction form
    163.62/225.80 = 89.94/x
  3. Step 3: Cross multiply
    163.62x = 225.80 × 89.94
  4. Step 4: Simplify right side
    163.62x = 20,308.00
  5. Step 5: Solve for x
    x = 20,308.00/163.62
  6. Step 6: Final answer
    x = 124.12

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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.