Home / 85,469,149.20-128,203,723.80-76,959,094.80

Finding the Fourth Proportional to 85,469,149.20, 128,203,723.80 and 76,959,094.80

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Solution

The fourth proportional to 85,469,149.20, 128,203,723.80 and 76,959,094.80 is: 115,438,642.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,469,149.20 : 128,203,723.80 = 76,959,094.80 : x
  2. Step 2: Convert to fraction form
    85,469,149.20/128,203,723.80 = 76,959,094.80/x
  3. Step 3: Cross multiply
    85,469,149.20x = 128,203,723.80 × 76,959,094.80
  4. Step 4: Simplify right side
    85,469,149.20x = 9,866,442,533,637,216
  5. Step 5: Solve for x
    x = 9,866,442,533,637,216/85,469,149.20
  6. Step 6: Final answer
    x = 115,438,642.20

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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.