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Finding the Fourth Proportional to 103,704.40, 155,297.40 and 68,453.20

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Solution

The fourth proportional to 103,704.40, 155,297.40 and 68,453.20 is: 102,508.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,704.40 : 155,297.40 = 68,453.20 : x
  2. Step 2: Convert to fraction form
    103,704.40/155,297.40 = 68,453.20/x
  3. Step 3: Cross multiply
    103,704.40x = 155,297.40 × 68,453.20
  4. Step 4: Simplify right side
    103,704.40x = 10,630,603,981.68
  5. Step 5: Solve for x
    x = 10,630,603,981.68/103,704.40
  6. Step 6: Final answer
    x = 102,508.71

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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.