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Finding the Fourth Proportional to 71,408.43, 107,123.58 and 18,822.03

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Solution

The fourth proportional to 71,408.43, 107,123.58 and 18,822.03 is: 28,235.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,408.43 : 107,123.58 = 18,822.03 : x
  2. Step 2: Convert to fraction form
    71,408.43/107,123.58 = 18,822.03/x
  3. Step 3: Cross multiply
    71,408.43x = 107,123.58 × 18,822.03
  4. Step 4: Simplify right side
    71,408.43x = 2,016,283,236.47
  5. Step 5: Solve for x
    x = 2,016,283,236.47/71,408.43
  6. Step 6: Final answer
    x = 28,235.93

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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.