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Finding the Fourth Proportional to 79,007,812.20, 110,686,519.80 and 79,007,812.20

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Solution

The fourth proportional to 79,007,812.20, 110,686,519.80 and 79,007,812.20 is: 110,686,519.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,007,812.20 : 110,686,519.80 = 79,007,812.20 : x
  2. Step 2: Convert to fraction form
    79,007,812.20/110,686,519.80 = 79,007,812.20/x
  3. Step 3: Cross multiply
    79,007,812.20x = 110,686,519.80 × 79,007,812.20
  4. Step 4: Simplify right side
    79,007,812.20x = 8,745,099,769,429,982
  5. Step 5: Solve for x
    x = 8,745,099,769,429,982/79,007,812.20
  6. Step 6: Final answer
    x = 110,686,519.80

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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.