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Finding the Fourth Proportional to 68,003.20, 102,004.80 and 40,355.20

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Solution

The fourth proportional to 68,003.20, 102,004.80 and 40,355.20 is: 60,532.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,003.20 : 102,004.80 = 40,355.20 : x
  2. Step 2: Convert to fraction form
    68,003.20/102,004.80 = 40,355.20/x
  3. Step 3: Cross multiply
    68,003.20x = 102,004.80 × 40,355.20
  4. Step 4: Simplify right side
    68,003.20x = 4,116,424,104.96
  5. Step 5: Solve for x
    x = 4,116,424,104.96/68,003.20
  6. Step 6: Final answer
    x = 60,532.80

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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.