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Finding the Fourth Proportional to 104.99, 144.79 and 94.19

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Solution

The fourth proportional to 104.99, 144.79 and 94.19 is: 129.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.99 : 144.79 = 94.19 : x
  2. Step 2: Convert to fraction form
    104.99/144.79 = 94.19/x
  3. Step 3: Cross multiply
    104.99x = 144.79 × 94.19
  4. Step 4: Simplify right side
    104.99x = 13,636.81
  5. Step 5: Solve for x
    x = 13,636.81/104.99
  6. Step 6: Final answer
    x = 129.89

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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.