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Finding the Fourth Proportional to 163.50, 225.63 and 105.36

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Solution

The fourth proportional to 163.50, 225.63 and 105.36 is: 145.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.50 : 225.63 = 105.36 : x
  2. Step 2: Convert to fraction form
    163.50/225.63 = 105.36/x
  3. Step 3: Cross multiply
    163.50x = 225.63 × 105.36
  4. Step 4: Simplify right side
    163.50x = 23,772.38
  5. Step 5: Solve for x
    x = 23,772.38/163.50
  6. Step 6: Final answer
    x = 145.40

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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.