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Finding the Fourth Proportional to 104.71, 144.36 and 88.31

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Solution

The fourth proportional to 104.71, 144.36 and 88.31 is: 121.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.71 : 144.36 = 88.31 : x
  2. Step 2: Convert to fraction form
    104.71/144.36 = 88.31/x
  3. Step 3: Cross multiply
    104.71x = 144.36 × 88.31
  4. Step 4: Simplify right side
    104.71x = 12,747.73
  5. Step 5: Solve for x
    x = 12,747.73/104.71
  6. Step 6: Final answer
    x = 121.74

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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.