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Finding the Fourth Proportional to 66,780.39, 100,186.79 and 20,033.27

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Solution

The fourth proportional to 66,780.39, 100,186.79 and 20,033.27 is: 30,054.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,780.39 : 100,186.79 = 20,033.27 : x
  2. Step 2: Convert to fraction form
    66,780.39/100,186.79 = 20,033.27/x
  3. Step 3: Cross multiply
    66,780.39x = 100,186.79 × 20,033.27
  4. Step 4: Simplify right side
    66,780.39x = 2,007,068,413.40
  5. Step 5: Solve for x
    x = 2,007,068,413.40/66,780.39
  6. Step 6: Final answer
    x = 30,054.76

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1.5x scale

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.