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Finding the Fourth Proportional to 68,913.20, 103,240.20 and 35,519.60

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Solution

The fourth proportional to 68,913.20, 103,240.20 and 35,519.60 is: 53,212.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,913.20 : 103,240.20 = 35,519.60 : x
  2. Step 2: Convert to fraction form
    68,913.20/103,240.20 = 35,519.60/x
  3. Step 3: Cross multiply
    68,913.20x = 103,240.20 × 35,519.60
  4. Step 4: Simplify right side
    68,913.20x = 3,667,050,607.92
  5. Step 5: Solve for x
    x = 3,667,050,607.92/68,913.20
  6. Step 6: Final answer
    x = 53,212.60

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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.