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Finding the Fourth Proportional to 78,881,644.80, 118,322,467.20 and 78,881,644.80

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Solution

The fourth proportional to 78,881,644.80, 118,322,467.20 and 78,881,644.80 is: 118,322,467.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,881,644.80 : 118,322,467.20 = 78,881,644.80 : x
  2. Step 2: Convert to fraction form
    78,881,644.80/118,322,467.20 = 78,881,644.80/x
  3. Step 3: Cross multiply
    78,881,644.80x = 118,322,467.20 × 78,881,644.80
  4. Step 4: Simplify right side
    78,881,644.80x = 9,333,470,829,530,050
  5. Step 5: Solve for x
    x = 9,333,470,829,530,050/78,881,644.80
  6. Step 6: Final answer
    x = 118,322,467.20

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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.