Home / 215,039.10-322,449.30-126,319.80

Finding the Fourth Proportional to 215,039.10, 322,449.30 and 126,319.80

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Solution

The fourth proportional to 215,039.10, 322,449.30 and 126,319.80 is: 189,415.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,039.10 : 322,449.30 = 126,319.80 : x
  2. Step 2: Convert to fraction form
    215,039.10/322,449.30 = 126,319.80/x
  3. Step 3: Cross multiply
    215,039.10x = 322,449.30 × 126,319.80
  4. Step 4: Simplify right side
    215,039.10x = 40,731,731,086.14
  5. Step 5: Solve for x
    x = 40,731,731,086.14/215,039.10
  6. Step 6: Final answer
    x = 189,415.46

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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.