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Finding the Fourth Proportional to 140,662,564.80, 210,993,847.20 and 49,795,339.20

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Solution

The fourth proportional to 140,662,564.80, 210,993,847.20 and 49,795,339.20 is: 74,693,008.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,662,564.80 : 210,993,847.20 = 49,795,339.20 : x
  2. Step 2: Convert to fraction form
    140,662,564.80/210,993,847.20 = 49,795,339.20/x
  3. Step 3: Cross multiply
    140,662,564.80x = 210,993,847.20 × 49,795,339.20
  4. Step 4: Simplify right side
    140,662,564.80x = 10,506,510,190,436,970
  5. Step 5: Solve for x
    x = 10,506,510,190,436,970/140,662,564.80
  6. Step 6: Final answer
    x = 74,693,008.80

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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.