Home / 126,213.40-189,089.70-76,907.80

Finding the Fourth Proportional to 126,213.40, 189,089.70 and 76,907.80

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Solution

The fourth proportional to 126,213.40, 189,089.70 and 76,907.80 is: 115,221.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,213.40 : 189,089.70 = 76,907.80 : x
  2. Step 2: Convert to fraction form
    126,213.40/189,089.70 = 76,907.80/x
  3. Step 3: Cross multiply
    126,213.40x = 189,089.70 × 76,907.80
  4. Step 4: Simplify right side
    126,213.40x = 14,542,472,829.66
  5. Step 5: Solve for x
    x = 14,542,472,829.66/126,213.40
  6. Step 6: Final answer
    x = 115,221.31

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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.