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Finding the Fourth Proportional to 104.23, 142.99 and 103.39

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Solution

The fourth proportional to 104.23, 142.99 and 103.39 is: 141.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.23 : 142.99 = 103.39 : x
  2. Step 2: Convert to fraction form
    104.23/142.99 = 103.39/x
  3. Step 3: Cross multiply
    104.23x = 142.99 × 103.39
  4. Step 4: Simplify right side
    104.23x = 14,783.74
  5. Step 5: Solve for x
    x = 14,783.74/104.23
  6. Step 6: Final answer
    x = 141.84

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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.