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Finding the Fourth Proportional to 104.46, 156.42 and 84.12

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Solution

The fourth proportional to 104.46, 156.42 and 84.12 is: 125.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.46 : 156.42 = 84.12 : x
  2. Step 2: Convert to fraction form
    104.46/156.42 = 84.12/x
  3. Step 3: Cross multiply
    104.46x = 156.42 × 84.12
  4. Step 4: Simplify right side
    104.46x = 13,158.05
  5. Step 5: Solve for x
    x = 13,158.05/104.46
  6. Step 6: Final answer
    x = 125.96

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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.