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Finding the Fourth Proportional to 108.75, 163.09 and 40.26

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Solution

The fourth proportional to 108.75, 163.09 and 40.26 is: 60.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.75 : 163.09 = 40.26 : x
  2. Step 2: Convert to fraction form
    108.75/163.09 = 40.26/x
  3. Step 3: Cross multiply
    108.75x = 163.09 × 40.26
  4. Step 4: Simplify right side
    108.75x = 6,566.00
  5. Step 5: Solve for x
    x = 6,566.00/108.75
  6. Step 6: Final answer
    x = 60.38

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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.