Home / 72,717.28-109,041-43,138.96

Finding the Fourth Proportional to 72,717.28, 109,041 and 43,138.96

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Solution

The fourth proportional to 72,717.28, 109,041 and 43,138.96 is: 64,687.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,717.28 : 109,041 = 43,138.96 : x
  2. Step 2: Convert to fraction form
    72,717.28/109,041 = 43,138.96/x
  3. Step 3: Cross multiply
    72,717.28x = 109,041 × 43,138.96
  4. Step 4: Simplify right side
    72,717.28x = 4,703,915,337.36
  5. Step 5: Solve for x
    x = 4,703,915,337.36/72,717.28
  6. Step 6: Final answer
    x = 64,687.72

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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.