Home / 103,983.89-143,183.21-85,766.90

Finding the Fourth Proportional to 103,983.89, 143,183.21 and 85,766.90

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Solution

The fourth proportional to 103,983.89, 143,183.21 and 85,766.90 is: 118,098.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,983.89 : 143,183.21 = 85,766.90 : x
  2. Step 2: Convert to fraction form
    103,983.89/143,183.21 = 85,766.90/x
  3. Step 3: Cross multiply
    103,983.89x = 143,183.21 × 85,766.90
  4. Step 4: Simplify right side
    103,983.89x = 12,280,378,909.00
  5. Step 5: Solve for x
    x = 12,280,378,909.00/103,983.89
  6. Step 6: Final answer
    x = 118,098.87

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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.