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Finding the Fourth Proportional to 209,952,431.80, 314,928,647.70 and 123,646,413.40

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Solution

The fourth proportional to 209,952,431.80, 314,928,647.70 and 123,646,413.40 is: 185,469,620.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,952,431.80 : 314,928,647.70 = 123,646,413.40 : x
  2. Step 2: Convert to fraction form
    209,952,431.80/314,928,647.70 = 123,646,413.40/x
  3. Step 3: Cross multiply
    209,952,431.80x = 314,928,647.70 × 123,646,413.40
  4. Step 4: Simplify right side
    209,952,431.80x = 38,939,797,765,017,160
  5. Step 5: Solve for x
    x = 38,939,797,765,017,160/209,952,431.80
  6. Step 6: Final answer
    x = 185,469,620.10

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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.