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Finding the Fourth Proportional to 66,876,880.80, 100,220,842.80 and 49,469,235.60

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Solution

The fourth proportional to 66,876,880.80, 100,220,842.80 and 49,469,235.60 is: 74,133,967.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,876,880.80 : 100,220,842.80 = 49,469,235.60 : x
  2. Step 2: Convert to fraction form
    66,876,880.80/100,220,842.80 = 49,469,235.60/x
  3. Step 3: Cross multiply
    66,876,880.80x = 100,220,842.80 × 49,469,235.60
  4. Step 4: Simplify right side
    66,876,880.80x = 4,957,848,484,503,764
  5. Step 5: Solve for x
    x = 4,957,848,484,503,764/66,876,880.80
  6. Step 6: Final answer
    x = 74,133,967.15

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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.