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Finding the Fourth Proportional to 84,121,208.20, 117,939,752.60 and 84,121,208.20

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Solution

The fourth proportional to 84,121,208.20, 117,939,752.60 and 84,121,208.20 is: 117,939,752.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,121,208.20 : 117,939,752.60 = 84,121,208.20 : x
  2. Step 2: Convert to fraction form
    84,121,208.20/117,939,752.60 = 84,121,208.20/x
  3. Step 3: Cross multiply
    84,121,208.20x = 117,939,752.60 × 84,121,208.20
  4. Step 4: Simplify right side
    84,121,208.20x = 9,921,234,483,521,092
  5. Step 5: Solve for x
    x = 9,921,234,483,521,092/84,121,208.20
  6. Step 6: Final answer
    x = 117,939,752.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.