Home / 212,653,260.80-318,979,891.20-115,907,379.20

Finding the Fourth Proportional to 212,653,260.80, 318,979,891.20 and 115,907,379.20

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Solution

The fourth proportional to 212,653,260.80, 318,979,891.20 and 115,907,379.20 is: 173,861,068.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,653,260.80 : 318,979,891.20 = 115,907,379.20 : x
  2. Step 2: Convert to fraction form
    212,653,260.80/318,979,891.20 = 115,907,379.20/x
  3. Step 3: Cross multiply
    212,653,260.80x = 318,979,891.20 × 115,907,379.20
  4. Step 4: Simplify right side
    212,653,260.80x = 36,972,123,206,493,144
  5. Step 5: Solve for x
    x = 36,972,123,206,493,144/212,653,260.80
  6. Step 6: Final answer
    x = 173,861,068.80

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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.