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Finding the Fourth Proportional to 71,383.87, 107,081.07 and 18,793

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Solution

The fourth proportional to 71,383.87, 107,081.07 and 18,793 is: 28,190.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,383.87 : 107,081.07 = 18,793 : x
  2. Step 2: Convert to fraction form
    71,383.87/107,081.07 = 18,793/x
  3. Step 3: Cross multiply
    71,383.87x = 107,081.07 × 18,793
  4. Step 4: Simplify right side
    71,383.87x = 2,012,374,548.51
  5. Step 5: Solve for x
    x = 2,012,374,548.51/71,383.87
  6. Step 6: Final answer
    x = 28,190.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.