Home / 126,138.50-189,422-84,287.48

Finding the Fourth Proportional to 126,138.50, 189,422 and 84,287.48

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Solution

The fourth proportional to 126,138.50, 189,422 and 84,287.48 is: 126,574.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,138.50 : 189,422 = 84,287.48 : x
  2. Step 2: Convert to fraction form
    126,138.50/189,422 = 84,287.48/x
  3. Step 3: Cross multiply
    126,138.50x = 189,422 × 84,287.48
  4. Step 4: Simplify right side
    126,138.50x = 15,965,903,036.56
  5. Step 5: Solve for x
    x = 15,965,903,036.56/126,138.50
  6. Step 6: Final answer
    x = 126,574.38

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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.