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Finding the Fourth Proportional to 104.58, 144.31 and 60.91

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Solution

The fourth proportional to 104.58, 144.31 and 60.91 is: 84.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.58 : 144.31 = 60.91 : x
  2. Step 2: Convert to fraction form
    104.58/144.31 = 60.91/x
  3. Step 3: Cross multiply
    104.58x = 144.31 × 60.91
  4. Step 4: Simplify right side
    104.58x = 8,789.20
  5. Step 5: Solve for x
    x = 8,789.20/104.58
  6. Step 6: Final answer
    x = 84.04

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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.