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Finding the Fourth Proportional to 81.25, 112.14 and 46.29

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Solution

The fourth proportional to 81.25, 112.14 and 46.29 is: 63.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.25 : 112.14 = 46.29 : x
  2. Step 2: Convert to fraction form
    81.25/112.14 = 46.29/x
  3. Step 3: Cross multiply
    81.25x = 112.14 × 46.29
  4. Step 4: Simplify right side
    81.25x = 5,190.73
  5. Step 5: Solve for x
    x = 5,190.73/81.25
  6. Step 6: Final answer
    x = 63.89

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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.