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Finding the Fourth Proportional to 20,054,427.20, 30,081,640.80 and 18,778,968.80

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Solution

The fourth proportional to 20,054,427.20, 30,081,640.80 and 18,778,968.80 is: 28,168,453.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,054,427.20 : 30,081,640.80 = 18,778,968.80 : x
  2. Step 2: Convert to fraction form
    20,054,427.20/30,081,640.80 = 18,778,968.80/x
  3. Step 3: Cross multiply
    20,054,427.20x = 30,081,640.80 × 18,778,968.80
  4. Step 4: Simplify right side
    20,054,427.20x = 564,902,194,036,007.12
  5. Step 5: Solve for x
    x = 564,902,194,036,007.12/20,054,427.20
  6. Step 6: Final answer
    x = 28,168,453.20

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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.