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Finding the Fourth Proportional to 68,960.20, 103,440.30 and 48,839.80

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Solution

The fourth proportional to 68,960.20, 103,440.30 and 48,839.80 is: 73,259.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,960.20 : 103,440.30 = 48,839.80 : x
  2. Step 2: Convert to fraction form
    68,960.20/103,440.30 = 48,839.80/x
  3. Step 3: Cross multiply
    68,960.20x = 103,440.30 × 48,839.80
  4. Step 4: Simplify right side
    68,960.20x = 5,052,003,563.94
  5. Step 5: Solve for x
    x = 5,052,003,563.94/68,960.20
  6. Step 6: Final answer
    x = 73,259.70

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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.