Home / 189,749.82-261,829.39-121,858.73

Finding the Fourth Proportional to 189,749.82, 261,829.39 and 121,858.73

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Solution

The fourth proportional to 189,749.82, 261,829.39 and 121,858.73 is: 168,148.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,749.82 : 261,829.39 = 121,858.73 : x
  2. Step 2: Convert to fraction form
    189,749.82/261,829.39 = 121,858.73/x
  3. Step 3: Cross multiply
    189,749.82x = 261,829.39 × 121,858.73
  4. Step 4: Simplify right side
    189,749.82x = 31,906,196,195.90
  5. Step 5: Solve for x
    x = 31,906,196,195.90/189,749.82
  6. Step 6: Final answer
    x = 168,148.76

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1.5x scale

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.