Home / 126,907.86-189,921.13-78,856.74

Finding the Fourth Proportional to 126,907.86, 189,921.13 and 78,856.74

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Solution

The fourth proportional to 126,907.86, 189,921.13 and 78,856.74 is: 118,011.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,907.86 : 189,921.13 = 78,856.74 : x
  2. Step 2: Convert to fraction form
    126,907.86/189,921.13 = 78,856.74/x
  3. Step 3: Cross multiply
    126,907.86x = 189,921.13 × 78,856.74
  4. Step 4: Simplify right side
    126,907.86x = 14,976,561,168.92
  5. Step 5: Solve for x
    x = 14,976,561,168.92/126,907.86
  6. Step 6: Final answer
    x = 118,011.30

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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.