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Finding the Fourth Proportional to 69,772.60, 103,920.08 and 69,432.70

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Solution

The fourth proportional to 69,772.60, 103,920.08 and 69,432.70 is: 103,413.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,772.60 : 103,920.08 = 69,432.70 : x
  2. Step 2: Convert to fraction form
    69,772.60/103,920.08 = 69,432.70/x
  3. Step 3: Cross multiply
    69,772.60x = 103,920.08 × 69,432.70
  4. Step 4: Simplify right side
    69,772.60x = 7,215,451,738.62
  5. Step 5: Solve for x
    x = 7,215,451,738.62/69,772.60
  6. Step 6: Final answer
    x = 103,413.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.