Home / 126,018.20-189,027.30-81,403.40

Finding the Fourth Proportional to 126,018.20, 189,027.30 and 81,403.40

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Solution

The fourth proportional to 126,018.20, 189,027.30 and 81,403.40 is: 122,105.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,018.20 : 189,027.30 = 81,403.40 : x
  2. Step 2: Convert to fraction form
    126,018.20/189,027.30 = 81,403.40/x
  3. Step 3: Cross multiply
    126,018.20x = 189,027.30 × 81,403.40
  4. Step 4: Simplify right side
    126,018.20x = 15,387,464,912.82
  5. Step 5: Solve for x
    x = 15,387,464,912.82/126,018.20
  6. Step 6: Final answer
    x = 122,105.10

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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.