Home / 126,108.12-188,828.46-76,121.40

Finding the Fourth Proportional to 126,108.12, 188,828.46 and 76,121.40

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Solution

The fourth proportional to 126,108.12, 188,828.46 and 76,121.40 is: 113,980.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,108.12 : 188,828.46 = 76,121.40 : x
  2. Step 2: Convert to fraction form
    126,108.12/188,828.46 = 76,121.40/x
  3. Step 3: Cross multiply
    126,108.12x = 188,828.46 × 76,121.40
  4. Step 4: Simplify right side
    126,108.12x = 14,373,886,735.04
  5. Step 5: Solve for x
    x = 14,373,886,735.04/126,108.12
  6. Step 6: Final answer
    x = 113,980.66

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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.