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Finding the Fourth Proportional to 208,986.80, 313,614.60 and 115,559.60

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Solution

The fourth proportional to 208,986.80, 313,614.60 and 115,559.60 is: 173,413.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,986.80 : 313,614.60 = 115,559.60 : x
  2. Step 2: Convert to fraction form
    208,986.80/313,614.60 = 115,559.60/x
  3. Step 3: Cross multiply
    208,986.80x = 313,614.60 × 115,559.60
  4. Step 4: Simplify right side
    208,986.80x = 36,241,177,730.16
  5. Step 5: Solve for x
    x = 36,241,177,730.16/208,986.80
  6. Step 6: Final answer
    x = 173,413.72

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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.