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Finding the Fourth Proportional to 72,761,608.80, 109,142,413.20 and 43,662,261.60

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Solution

The fourth proportional to 72,761,608.80, 109,142,413.20 and 43,662,261.60 is: 65,493,392.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,761,608.80 : 109,142,413.20 = 43,662,261.60 : x
  2. Step 2: Convert to fraction form
    72,761,608.80/109,142,413.20 = 43,662,261.60/x
  3. Step 3: Cross multiply
    72,761,608.80x = 109,142,413.20 × 43,662,261.60
  4. Step 4: Simplify right side
    72,761,608.80x = 4,765,404,596,793,693
  5. Step 5: Solve for x
    x = 4,765,404,596,793,693/72,761,608.80
  6. Step 6: Final answer
    x = 65,493,392.40

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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.