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Finding the Fourth Proportional to 104.46, 142.92 and 104.03

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Solution

The fourth proportional to 104.46, 142.92 and 104.03 is: 142.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.46 : 142.92 = 104.03 : x
  2. Step 2: Convert to fraction form
    104.46/142.92 = 104.03/x
  3. Step 3: Cross multiply
    104.46x = 142.92 × 104.03
  4. Step 4: Simplify right side
    104.46x = 14,867.25
  5. Step 5: Solve for x
    x = 14,867.25/104.46
  6. Step 6: Final answer
    x = 142.32

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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.