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Finding the Fourth Proportional to 108.25, 149.39 and 62.25

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Solution

The fourth proportional to 108.25, 149.39 and 62.25 is: 85.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.25 : 149.39 = 62.25 : x
  2. Step 2: Convert to fraction form
    108.25/149.39 = 62.25/x
  3. Step 3: Cross multiply
    108.25x = 149.39 × 62.25
  4. Step 4: Simplify right side
    108.25x = 9,299.22
  5. Step 5: Solve for x
    x = 9,299.22/108.25
  6. Step 6: Final answer
    x = 85.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.