Home / 263,187.36-394,678.08-85,651.20

Finding the Fourth Proportional to 263,187.36, 394,678.08 and 85,651.20

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Solution

The fourth proportional to 263,187.36, 394,678.08 and 85,651.20 is: 128,443.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,187.36 : 394,678.08 = 85,651.20 : x
  2. Step 2: Convert to fraction form
    263,187.36/394,678.08 = 85,651.20/x
  3. Step 3: Cross multiply
    263,187.36x = 394,678.08 × 85,651.20
  4. Step 4: Simplify right side
    263,187.36x = 33,804,651,165.70
  5. Step 5: Solve for x
    x = 33,804,651,165.70/263,187.36
  6. Step 6: Final answer
    x = 128,443.29

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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.