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Finding the Fourth Proportional to 19,128,621,987,074, 28,692,932,980,611 and 19,128,621,987,074

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Solution

The fourth proportional to 19,128,621,987,074, 28,692,932,980,611 and 19,128,621,987,074 is: 28,692,932,980,611

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128,621,987,074 : 28,692,932,980,611 = 19,128,621,987,074 : x
  2. Step 2: Convert to fraction form
    19,128,621,987,074/28,692,932,980,611 = 19,128,621,987,074/x
  3. Step 3: Cross multiply
    19,128,621,987,074x = 28,692,932,980,611 × 19,128,621,987,074
  4. Step 4: Simplify right side
    19,128,621,987,074x = 548,856,268,686,556,293,498,929,152
  5. Step 5: Solve for x
    x = 548,856,268,686,556,293,498,929,152/19,128,621,987,074
  6. Step 6: Final answer
    x = 28,692,932,980,611

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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.