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Finding the Fourth Proportional to 115,215,122.80, 172,822,684.20 and 115,215,122.80

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Solution

The fourth proportional to 115,215,122.80, 172,822,684.20 and 115,215,122.80 is: 172,822,684.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,215,122.80 : 172,822,684.20 = 115,215,122.80 : x
  2. Step 2: Convert to fraction form
    115,215,122.80/172,822,684.20 = 115,215,122.80/x
  3. Step 3: Cross multiply
    115,215,122.80x = 172,822,684.20 × 115,215,122.80
  4. Step 4: Simplify right side
    115,215,122.80x = 19,911,786,782,728,616
  5. Step 5: Solve for x
    x = 19,911,786,782,728,616/115,215,122.80
  6. Step 6: Final answer
    x = 172,822,684.20

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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.