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Finding the Fourth Proportional to 108.09, 162.87 and 89.25

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Solution

The fourth proportional to 108.09, 162.87 and 89.25 is: 134.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.09 : 162.87 = 89.25 : x
  2. Step 2: Convert to fraction form
    108.09/162.87 = 89.25/x
  3. Step 3: Cross multiply
    108.09x = 162.87 × 89.25
  4. Step 4: Simplify right side
    108.09x = 14,534.89
  5. Step 5: Solve for x
    x = 14,534.89/108.09
  6. Step 6: Final answer
    x = 134.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.