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Finding the Fourth Proportional to 104.58, 144.45 and 99.11

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Solution

The fourth proportional to 104.58, 144.45 and 99.11 is: 136.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.58 : 144.45 = 99.11 : x
  2. Step 2: Convert to fraction form
    104.58/144.45 = 99.11/x
  3. Step 3: Cross multiply
    104.58x = 144.45 × 99.11
  4. Step 4: Simplify right side
    104.58x = 14,316.44
  5. Step 5: Solve for x
    x = 14,316.44/104.58
  6. Step 6: Final answer
    x = 136.89

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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.