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Finding the Fourth Proportional to 108.63, 163.01 and 107.72

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Solution

The fourth proportional to 108.63, 163.01 and 107.72 is: 161.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.63 : 163.01 = 107.72 : x
  2. Step 2: Convert to fraction form
    108.63/163.01 = 107.72/x
  3. Step 3: Cross multiply
    108.63x = 163.01 × 107.72
  4. Step 4: Simplify right side
    108.63x = 17,558.08
  5. Step 5: Solve for x
    x = 17,558.08/108.63
  6. Step 6: Final answer
    x = 161.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.