Home / 85,481,405.64-128,220,310.26-20,785,542.48

Finding the Fourth Proportional to 85,481,405.64, 128,220,310.26 and 20,785,542.48

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Solution

The fourth proportional to 85,481,405.64, 128,220,310.26 and 20,785,542.48 is: 31,177,876.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,481,405.64 : 128,220,310.26 = 20,785,542.48 : x
  2. Step 2: Convert to fraction form
    85,481,405.64/128,220,310.26 = 20,785,542.48/x
  3. Step 3: Cross multiply
    85,481,405.64x = 128,220,310.26 × 20,785,542.48
  4. Step 4: Simplify right side
    85,481,405.64x = 2,665,128,705,708,010
  5. Step 5: Solve for x
    x = 2,665,128,705,708,010/85,481,405.64
  6. Step 6: Final answer
    x = 31,177,876.47

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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.