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Finding the Fourth Proportional to 81,405,266.80, 122,072,470.80 and 26,796,751.60

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Solution

The fourth proportional to 81,405,266.80, 122,072,470.80 and 26,796,751.60 is: 40,183,464.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,405,266.80 : 122,072,470.80 = 26,796,751.60 : x
  2. Step 2: Convert to fraction form
    81,405,266.80/122,072,470.80 = 26,796,751.60/x
  3. Step 3: Cross multiply
    81,405,266.80x = 122,072,470.80 × 26,796,751.60
  4. Step 4: Simplify right side
    81,405,266.80x = 3,271,145,677,225,853.50
  5. Step 5: Solve for x
    x = 3,271,145,677,225,853.50/81,405,266.80
  6. Step 6: Final answer
    x = 40,183,464.85

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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.