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Finding the Fourth Proportional to 208,907.60, 313,413.24 and 97,970

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Solution

The fourth proportional to 208,907.60, 313,413.24 and 97,970 is: 146,979.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,907.60 : 313,413.24 = 97,970 : x
  2. Step 2: Convert to fraction form
    208,907.60/313,413.24 = 97,970/x
  3. Step 3: Cross multiply
    208,907.60x = 313,413.24 × 97,970
  4. Step 4: Simplify right side
    208,907.60x = 30,705,095,122.80
  5. Step 5: Solve for x
    x = 30,705,095,122.80/208,907.60
  6. Step 6: Final answer
    x = 146,979.31

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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.