Home / 143,520.87-198,083.09-83,128.28

Finding the Fourth Proportional to 143,520.87, 198,083.09 and 83,128.28

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Solution

The fourth proportional to 143,520.87, 198,083.09 and 83,128.28 is: 114,731.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,520.87 : 198,083.09 = 83,128.28 : x
  2. Step 2: Convert to fraction form
    143,520.87/198,083.09 = 83,128.28/x
  3. Step 3: Cross multiply
    143,520.87x = 198,083.09 × 83,128.28
  4. Step 4: Simplify right side
    143,520.87x = 16,466,305,162.73
  5. Step 5: Solve for x
    x = 16,466,305,162.73/143,520.87
  6. Step 6: Final answer
    x = 114,731.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.