Home / 126,905.36-189,917.39-78,854.23

Finding the Fourth Proportional to 126,905.36, 189,917.39 and 78,854.23

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Solution

The fourth proportional to 126,905.36, 189,917.39 and 78,854.23 is: 118,007.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,905.36 : 189,917.39 = 78,854.23 : x
  2. Step 2: Convert to fraction form
    126,905.36/189,917.39 = 78,854.23/x
  3. Step 3: Cross multiply
    126,905.36x = 189,917.39 × 78,854.23
  4. Step 4: Simplify right side
    126,905.36x = 14,975,789,986.59
  5. Step 5: Solve for x
    x = 14,975,789,986.59/126,905.36
  6. Step 6: Final answer
    x = 118,007.55

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1.5x scale

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.