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Finding the Fourth Proportional to 212,846,140.70, 319,269,211.05 and 212,846,140.70

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Solution

The fourth proportional to 212,846,140.70, 319,269,211.05 and 212,846,140.70 is: 319,269,211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,846,140.70 : 319,269,211.05 = 212,846,140.70 : x
  2. Step 2: Convert to fraction form
    212,846,140.70/319,269,211.05 = 212,846,140.70/x
  3. Step 3: Cross multiply
    212,846,140.70x = 319,269,211.05 × 212,846,140.70
  4. Step 4: Simplify right side
    212,846,140.70x = 67,955,219,416,326,296
  5. Step 5: Solve for x
    x = 67,955,219,416,326,296/212,846,140.70
  6. Step 6: Final answer
    x = 319,269,211.05

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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.