Home / 208,139.20-312,413.60-103,076.80

Finding the Fourth Proportional to 208,139.20, 312,413.60 and 103,076.80

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Solution

The fourth proportional to 208,139.20, 312,413.60 and 103,076.80 is: 154,716.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,139.20 : 312,413.60 = 103,076.80 : x
  2. Step 2: Convert to fraction form
    208,139.20/312,413.60 = 103,076.80/x
  3. Step 3: Cross multiply
    208,139.20x = 312,413.60 × 103,076.80
  4. Step 4: Simplify right side
    208,139.20x = 32,202,594,164.48
  5. Step 5: Solve for x
    x = 32,202,594,164.48/208,139.20
  6. Step 6: Final answer
    x = 154,716.62

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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.