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Finding the Fourth Proportional to 163.31, 225.02 and 111.47

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Solution

The fourth proportional to 163.31, 225.02 and 111.47 is: 153.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.31 : 225.02 = 111.47 : x
  2. Step 2: Convert to fraction form
    163.31/225.02 = 111.47/x
  3. Step 3: Cross multiply
    163.31x = 225.02 × 111.47
  4. Step 4: Simplify right side
    163.31x = 25,081.30
  5. Step 5: Solve for x
    x = 25,081.30/163.31
  6. Step 6: Final answer
    x = 153.59

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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.