Home / 428,930,185.73-643,491,528.46-137,813,891.81

Finding the Fourth Proportional to 428,930,185.73, 643,491,528.46 and 137,813,891.81

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Solution

The fourth proportional to 428,930,185.73, 643,491,528.46 and 137,813,891.81 is: 206,751,762.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,930,185.73 : 643,491,528.46 = 137,813,891.81 : x
  2. Step 2: Convert to fraction form
    428,930,185.73/643,491,528.46 = 137,813,891.81/x
  3. Step 3: Cross multiply
    428,930,185.73x = 643,491,528.46 × 137,813,891.81
  4. Step 4: Simplify right side
    428,930,185.73x = 88,682,071,880,275,984
  5. Step 5: Solve for x
    x = 88,682,071,880,275,984/428,930,185.73
  6. Step 6: Final answer
    x = 206,751,762.48

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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.