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Finding the Fourth Proportional to 104.92, 143.84 and 103.08

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Solution

The fourth proportional to 104.92, 143.84 and 103.08 is: 141.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.92 : 143.84 = 103.08 : x
  2. Step 2: Convert to fraction form
    104.92/143.84 = 103.08/x
  3. Step 3: Cross multiply
    104.92x = 143.84 × 103.08
  4. Step 4: Simplify right side
    104.92x = 14,827.03
  5. Step 5: Solve for x
    x = 14,827.03/104.92
  6. Step 6: Final answer
    x = 141.32

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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.