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Finding the Fourth Proportional to 108.56, 162.84 and 89.52

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Solution

The fourth proportional to 108.56, 162.84 and 89.52 is: 134.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.56 : 162.84 = 89.52 : x
  2. Step 2: Convert to fraction form
    108.56/162.84 = 89.52/x
  3. Step 3: Cross multiply
    108.56x = 162.84 × 89.52
  4. Step 4: Simplify right side
    108.56x = 14,577.44
  5. Step 5: Solve for x
    x = 14,577.44/108.56
  6. Step 6: Final answer
    x = 134.28

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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.