Home / 189,761.20-261,872.40-103,722.64

Finding the Fourth Proportional to 189,761.20, 261,872.40 and 103,722.64

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Solution

The fourth proportional to 189,761.20, 261,872.40 and 103,722.64 is: 143,138.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,761.20 : 261,872.40 = 103,722.64 : x
  2. Step 2: Convert to fraction form
    189,761.20/261,872.40 = 103,722.64/x
  3. Step 3: Cross multiply
    189,761.20x = 261,872.40 × 103,722.64
  4. Step 4: Simplify right side
    189,761.20x = 27,162,096,671.14
  5. Step 5: Solve for x
    x = 27,162,096,671.14/189,761.20
  6. Step 6: Final answer
    x = 143,138.31

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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.