Home / 81,120.26-111,944.96-45,311.78

Finding the Fourth Proportional to 81,120.26, 111,944.96 and 45,311.78

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Solution

The fourth proportional to 81,120.26, 111,944.96 and 45,311.78 is: 62,529.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,120.26 : 111,944.96 = 45,311.78 : x
  2. Step 2: Convert to fraction form
    81,120.26/111,944.96 = 45,311.78/x
  3. Step 3: Cross multiply
    81,120.26x = 111,944.96 × 45,311.78
  4. Step 4: Simplify right side
    81,120.26x = 5,072,425,399.63
  5. Step 5: Solve for x
    x = 5,072,425,399.63/81,120.26
  6. Step 6: Final answer
    x = 62,529.70

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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.