Home / 189,708.14-261,919.31-121,754.41

Finding the Fourth Proportional to 189,708.14, 261,919.31 and 121,754.41

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Solution

The fourth proportional to 189,708.14, 261,919.31 and 121,754.41 is: 168,099.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,708.14 : 261,919.31 = 121,754.41 : x
  2. Step 2: Convert to fraction form
    189,708.14/261,919.31 = 121,754.41/x
  3. Step 3: Cross multiply
    189,708.14x = 261,919.31 × 121,754.41
  4. Step 4: Simplify right side
    189,708.14x = 31,889,829,793.09
  5. Step 5: Solve for x
    x = 31,889,829,793.09/189,708.14
  6. Step 6: Final answer
    x = 168,099.43

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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.