Home / 126,777.06-189,786.78-76,705.83

Finding the Fourth Proportional to 126,777.06, 189,786.78 and 76,705.83

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Solution

The fourth proportional to 126,777.06, 189,786.78 and 76,705.83 is: 114,829.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,777.06 : 189,786.78 = 76,705.83 : x
  2. Step 2: Convert to fraction form
    126,777.06/189,786.78 = 76,705.83/x
  3. Step 3: Cross multiply
    126,777.06x = 189,786.78 × 76,705.83
  4. Step 4: Simplify right side
    126,777.06x = 14,557,752,482.93
  5. Step 5: Solve for x
    x = 14,557,752,482.93/126,777.06
  6. Step 6: Final answer
    x = 114,829.55

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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.