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Finding the Fourth Proportional to 104.44, 156.84 and 86.54

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Solution

The fourth proportional to 104.44, 156.84 and 86.54 is: 129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.44 : 156.84 = 86.54 : x
  2. Step 2: Convert to fraction form
    104.44/156.84 = 86.54/x
  3. Step 3: Cross multiply
    104.44x = 156.84 × 86.54
  4. Step 4: Simplify right side
    104.44x = 13,572.93
  5. Step 5: Solve for x
    x = 13,572.93/104.44
  6. Step 6: Final answer
    x = 129.96

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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.