Home / 126,912.86-175,120.80-78,563.42

Finding the Fourth Proportional to 126,912.86, 175,120.80 and 78,563.42

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Solution

The fourth proportional to 126,912.86, 175,120.80 and 78,563.42 is: 108,405.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,912.86 : 175,120.80 = 78,563.42 : x
  2. Step 2: Convert to fraction form
    126,912.86/175,120.80 = 78,563.42/x
  3. Step 3: Cross multiply
    126,912.86x = 175,120.80 × 78,563.42
  4. Step 4: Simplify right side
    126,912.86x = 13,758,088,085.53
  5. Step 5: Solve for x
    x = 13,758,088,085.53/126,912.86
  6. Step 6: Final answer
    x = 108,405.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.