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Finding the Fourth Proportional to 72,991.87, 109,439.19 and 26,238.67

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Solution

The fourth proportional to 72,991.87, 109,439.19 and 26,238.67 is: 39,340.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,991.87 : 109,439.19 = 26,238.67 : x
  2. Step 2: Convert to fraction form
    72,991.87/109,439.19 = 26,238.67/x
  3. Step 3: Cross multiply
    72,991.87x = 109,439.19 × 26,238.67
  4. Step 4: Simplify right side
    72,991.87x = 2,871,538,791.48
  5. Step 5: Solve for x
    x = 2,871,538,791.48/72,991.87
  6. Step 6: Final answer
    x = 39,340.53

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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.