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Finding the Fourth Proportional to 212,904,048.20, 319,356,072.30 and 212,904,048.20

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Solution

The fourth proportional to 212,904,048.20, 319,356,072.30 and 212,904,048.20 is: 319,356,072.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,904,048.20 : 319,356,072.30 = 212,904,048.20 : x
  2. Step 2: Convert to fraction form
    212,904,048.20/319,356,072.30 = 212,904,048.20/x
  3. Step 3: Cross multiply
    212,904,048.20x = 319,356,072.30 × 212,904,048.20
  4. Step 4: Simplify right side
    212,904,048.20x = 67,992,200,609,921,880
  5. Step 5: Solve for x
    x = 67,992,200,609,921,880/212,904,048.20
  6. Step 6: Final answer
    x = 319,356,072.30

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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.