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Finding the Fourth Proportional to 108.14, 162.86 and 94.78

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Solution

The fourth proportional to 108.14, 162.86 and 94.78 is: 142.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.14 : 162.86 = 94.78 : x
  2. Step 2: Convert to fraction form
    108.14/162.86 = 94.78/x
  3. Step 3: Cross multiply
    108.14x = 162.86 × 94.78
  4. Step 4: Simplify right side
    108.14x = 15,435.87
  5. Step 5: Solve for x
    x = 15,435.87/108.14
  6. Step 6: Final answer
    x = 142.74

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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.