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Finding the Fourth Proportional to 163.31, 225.34 and 108.02

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Solution

The fourth proportional to 163.31, 225.34 and 108.02 is: 149.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.31 : 225.34 = 108.02 : x
  2. Step 2: Convert to fraction form
    163.31/225.34 = 108.02/x
  3. Step 3: Cross multiply
    163.31x = 225.34 × 108.02
  4. Step 4: Simplify right side
    163.31x = 24,341.71
  5. Step 5: Solve for x
    x = 24,341.71/163.31
  6. Step 6: Final answer
    x = 149.05

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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.