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Finding the Fourth Proportional to 79,282.40, 109,408.78 and 43,472.09

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Solution

The fourth proportional to 79,282.40, 109,408.78 and 43,472.09 is: 59,990.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,282.40 : 109,408.78 = 43,472.09 : x
  2. Step 2: Convert to fraction form
    79,282.40/109,408.78 = 43,472.09/x
  3. Step 3: Cross multiply
    79,282.40x = 109,408.78 × 43,472.09
  4. Step 4: Simplify right side
    79,282.40x = 4,756,228,414.28
  5. Step 5: Solve for x
    x = 4,756,228,414.28/79,282.40
  6. Step 6: Final answer
    x = 59,990.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.