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Finding the Fourth Proportional to 103,620.70, 155,431.05 and 95,455.90

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Solution

The fourth proportional to 103,620.70, 155,431.05 and 95,455.90 is: 143,183.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,620.70 : 155,431.05 = 95,455.90 : x
  2. Step 2: Convert to fraction form
    103,620.70/155,431.05 = 95,455.90/x
  3. Step 3: Cross multiply
    103,620.70x = 155,431.05 × 95,455.90
  4. Step 4: Simplify right side
    103,620.70x = 14,836,810,765.70
  5. Step 5: Solve for x
    x = 14,836,810,765.70/103,620.70
  6. Step 6: Final answer
    x = 143,183.85

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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.