Home / 126,245.72-189,240.60-81,900.74

Finding the Fourth Proportional to 126,245.72, 189,240.60 and 81,900.74

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Solution

The fourth proportional to 126,245.72, 189,240.60 and 81,900.74 is: 122,768.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,245.72 : 189,240.60 = 81,900.74 : x
  2. Step 2: Convert to fraction form
    126,245.72/189,240.60 = 81,900.74/x
  3. Step 3: Cross multiply
    126,245.72x = 189,240.60 × 81,900.74
  4. Step 4: Simplify right side
    126,245.72x = 15,498,945,178.04
  5. Step 5: Solve for x
    x = 15,498,945,178.04/126,245.72
  6. Step 6: Final answer
    x = 122,768.08

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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.