Home / 126,906.86-189,919.64-78,855.74

Finding the Fourth Proportional to 126,906.86, 189,919.64 and 78,855.74

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Solution

The fourth proportional to 126,906.86, 189,919.64 and 78,855.74 is: 118,009.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,906.86 : 189,919.64 = 78,855.74 : x
  2. Step 2: Convert to fraction form
    126,906.86/189,919.64 = 78,855.74/x
  3. Step 3: Cross multiply
    126,906.86x = 189,919.64 × 78,855.74
  4. Step 4: Simplify right side
    126,906.86x = 14,976,252,408.86
  5. Step 5: Solve for x
    x = 14,976,252,408.86/126,906.86
  6. Step 6: Final answer
    x = 118,009.80

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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.