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Finding the Fourth Proportional to 104.58, 144.33 and 71.87

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Solution

The fourth proportional to 104.58, 144.33 and 71.87 is: 99.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.58 : 144.33 = 71.87 : x
  2. Step 2: Convert to fraction form
    104.58/144.33 = 71.87/x
  3. Step 3: Cross multiply
    104.58x = 144.33 × 71.87
  4. Step 4: Simplify right side
    104.58x = 10,372.28
  5. Step 5: Solve for x
    x = 10,372.28/104.58
  6. Step 6: Final answer
    x = 99.18

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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.