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Finding the Fourth Proportional to 126,615, 189,852.39 and 51,787.69

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Solution

The fourth proportional to 126,615, 189,852.39 and 51,787.69 is: 77,652.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,615 : 189,852.39 = 51,787.69 : x
  2. Step 2: Convert to fraction form
    126,615/189,852.39 = 51,787.69/x
  3. Step 3: Cross multiply
    126,615x = 189,852.39 × 51,787.69
  4. Step 4: Simplify right side
    126,615x = 9,832,016,719.08
  5. Step 5: Solve for x
    x = 9,832,016,719.08/126,615
  6. Step 6: Final answer
    x = 77,652.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.