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Finding the Fourth Proportional to 72,099.40, 108,086.44 and 34,640.68

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Solution

The fourth proportional to 72,099.40, 108,086.44 and 34,640.68 is: 51,930.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,099.40 : 108,086.44 = 34,640.68 : x
  2. Step 2: Convert to fraction form
    72,099.40/108,086.44 = 34,640.68/x
  3. Step 3: Cross multiply
    72,099.40x = 108,086.44 × 34,640.68
  4. Step 4: Simplify right side
    72,099.40x = 3,744,187,780.38
  5. Step 5: Solve for x
    x = 3,744,187,780.38/72,099.40
  6. Step 6: Final answer
    x = 51,930.91

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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.