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Finding the Fourth Proportional to 135,478.76, 203,344.24 and 68,968.68

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Solution

The fourth proportional to 135,478.76, 203,344.24 and 68,968.68 is: 103,517.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,478.76 : 203,344.24 = 68,968.68 : x
  2. Step 2: Convert to fraction form
    135,478.76/203,344.24 = 68,968.68/x
  3. Step 3: Cross multiply
    135,478.76x = 203,344.24 × 68,968.68
  4. Step 4: Simplify right side
    135,478.76x = 14,024,383,981.92
  5. Step 5: Solve for x
    x = 14,024,383,981.92/135,478.76
  6. Step 6: Final answer
    x = 103,517.21

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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.