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Finding the Fourth Proportional to 65,408,051.20, 98,112,076.80 and 19,963,940.80

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Solution

The fourth proportional to 65,408,051.20, 98,112,076.80 and 19,963,940.80 is: 29,945,911.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,408,051.20 : 98,112,076.80 = 19,963,940.80 : x
  2. Step 2: Convert to fraction form
    65,408,051.20/98,112,076.80 = 19,963,940.80/x
  3. Step 3: Cross multiply
    65,408,051.20x = 98,112,076.80 × 19,963,940.80
  4. Step 4: Simplify right side
    65,408,051.20x = 1,958,703,693,000,253.50
  5. Step 5: Solve for x
    x = 1,958,703,693,000,253.50/65,408,051.20
  6. Step 6: Final answer
    x = 29,945,911.20

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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.