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Finding the Fourth Proportional to 75,759.70, 112,745.05 and 73,236.90

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Solution

The fourth proportional to 75,759.70, 112,745.05 and 73,236.90 is: 108,990.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,759.70 : 112,745.05 = 73,236.90 : x
  2. Step 2: Convert to fraction form
    75,759.70/112,745.05 = 73,236.90/x
  3. Step 3: Cross multiply
    75,759.70x = 112,745.05 × 73,236.90
  4. Step 4: Simplify right side
    75,759.70x = 8,257,097,952.35
  5. Step 5: Solve for x
    x = 8,257,097,952.35/75,759.70
  6. Step 6: Final answer
    x = 108,990.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.