Home / 76,942.20-115,413.30-43,764.60

Finding the Fourth Proportional to 76,942.20, 115,413.30 and 43,764.60

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Solution

The fourth proportional to 76,942.20, 115,413.30 and 43,764.60 is: 65,646.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,942.20 : 115,413.30 = 43,764.60 : x
  2. Step 2: Convert to fraction form
    76,942.20/115,413.30 = 43,764.60/x
  3. Step 3: Cross multiply
    76,942.20x = 115,413.30 × 43,764.60
  4. Step 4: Simplify right side
    76,942.20x = 5,051,016,909.18
  5. Step 5: Solve for x
    x = 5,051,016,909.18/76,942.20
  6. Step 6: Final answer
    x = 65,646.90

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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.