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Finding the Fourth Proportional to 104.12, 144.67 and 103.06

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Solution

The fourth proportional to 104.12, 144.67 and 103.06 is: 143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.12 : 144.67 = 103.06 : x
  2. Step 2: Convert to fraction form
    104.12/144.67 = 103.06/x
  3. Step 3: Cross multiply
    104.12x = 144.67 × 103.06
  4. Step 4: Simplify right side
    104.12x = 14,908.97
  5. Step 5: Solve for x
    x = 14,908.97/104.12
  6. Step 6: Final answer
    x = 143.20

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.