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Finding the Fourth Proportional to 72,759.87, 100,408.24 and 40,929.00

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Solution

The fourth proportional to 72,759.87, 100,408.24 and 40,929.00 is: 56,481.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,759.87 : 100,408.24 = 40,929.00 : x
  2. Step 2: Convert to fraction form
    72,759.87/100,408.24 = 40,929.00/x
  3. Step 3: Cross multiply
    72,759.87x = 100,408.24 × 40,929.00
  4. Step 4: Simplify right side
    72,759.87x = 4,109,608,529.59
  5. Step 5: Solve for x
    x = 4,109,608,529.59/72,759.87
  6. Step 6: Final answer
    x = 56,481.80

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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.