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Finding the Fourth Proportional to 68,765.87, 103,149.72 and 22,018.75

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Solution

The fourth proportional to 68,765.87, 103,149.72 and 22,018.75 is: 33,028.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,765.87 : 103,149.72 = 22,018.75 : x
  2. Step 2: Convert to fraction form
    68,765.87/103,149.72 = 22,018.75/x
  3. Step 3: Cross multiply
    68,765.87x = 103,149.72 × 22,018.75
  4. Step 4: Simplify right side
    68,765.87x = 2,271,227,639.38
  5. Step 5: Solve for x
    x = 2,271,227,639.38/68,765.87
  6. Step 6: Final answer
    x = 33,028.41

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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.