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Finding the Fourth Proportional to 43,138.75, 64,745.49 and 43,039.01

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Solution

The fourth proportional to 43,138.75, 64,745.49 and 43,039.01 is: 64,595.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,138.75 : 64,745.49 = 43,039.01 : x
  2. Step 2: Convert to fraction form
    43,138.75/64,745.49 = 43,039.01/x
  3. Step 3: Cross multiply
    43,138.75x = 64,745.49 × 43,039.01
  4. Step 4: Simplify right side
    43,138.75x = 2,786,581,791.56
  5. Step 5: Solve for x
    x = 2,786,581,791.56/43,138.75
  6. Step 6: Final answer
    x = 64,595.79

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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.