Home / 428,930,187.23-643,491,530.72-137,813,893.31

Finding the Fourth Proportional to 428,930,187.23, 643,491,530.72 and 137,813,893.31

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Solution

The fourth proportional to 428,930,187.23, 643,491,530.72 and 137,813,893.31 is: 206,751,764.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,930,187.23 : 643,491,530.72 = 137,813,893.31 : x
  2. Step 2: Convert to fraction form
    428,930,187.23/643,491,530.72 = 137,813,893.31/x
  3. Step 3: Cross multiply
    428,930,187.23x = 643,491,530.72 × 137,813,893.31
  4. Step 4: Simplify right side
    428,930,187.23x = 88,682,073,156,628,144
  5. Step 5: Solve for x
    x = 88,682,073,156,628,144/428,930,187.23
  6. Step 6: Final answer
    x = 206,751,764.73

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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.