Home / 189,876.39-261,905.91-121,785.46

Finding the Fourth Proportional to 189,876.39, 261,905.91 and 121,785.46

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Solution

The fourth proportional to 189,876.39, 261,905.91 and 121,785.46 is: 167,984.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,876.39 : 261,905.91 = 121,785.46 : x
  2. Step 2: Convert to fraction form
    189,876.39/261,905.91 = 121,785.46/x
  3. Step 3: Cross multiply
    189,876.39x = 261,905.91 × 121,785.46
  4. Step 4: Simplify right side
    189,876.39x = 31,896,330,614.61
  5. Step 5: Solve for x
    x = 31,896,330,614.61/189,876.39
  6. Step 6: Final answer
    x = 167,984.71

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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.