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Finding the Fourth Proportional to 104.83, 143.81 and 103.71

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Solution

The fourth proportional to 104.83, 143.81 and 103.71 is: 142.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.83 : 143.81 = 103.71 : x
  2. Step 2: Convert to fraction form
    104.83/143.81 = 103.71/x
  3. Step 3: Cross multiply
    104.83x = 143.81 × 103.71
  4. Step 4: Simplify right side
    104.83x = 14,914.94
  5. Step 5: Solve for x
    x = 14,914.94/104.83
  6. Step 6: Final answer
    x = 142.28

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.