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Finding the Fourth Proportional to 192,171,651.40, 288,257,477.10 and 70,978,025.80

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Solution

The fourth proportional to 192,171,651.40, 288,257,477.10 and 70,978,025.80 is: 106,467,038.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,171,651.40 : 288,257,477.10 = 70,978,025.80 : x
  2. Step 2: Convert to fraction form
    192,171,651.40/288,257,477.10 = 70,978,025.80/x
  3. Step 3: Cross multiply
    192,171,651.40x = 288,257,477.10 × 70,978,025.80
  4. Step 4: Simplify right side
    192,171,651.40x = 20,459,946,646,646,712
  5. Step 5: Solve for x
    x = 20,459,946,646,646,712/192,171,651.40
  6. Step 6: Final answer
    x = 106,467,038.70

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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.