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Finding the Fourth Proportional to 55,146,891.20, 82,720,336.80 and 55,146,891.20

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Solution

The fourth proportional to 55,146,891.20, 82,720,336.80 and 55,146,891.20 is: 82,720,336.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,146,891.20 : 82,720,336.80 = 55,146,891.20 : x
  2. Step 2: Convert to fraction form
    55,146,891.20/82,720,336.80 = 55,146,891.20/x
  3. Step 3: Cross multiply
    55,146,891.20x = 82,720,336.80 × 55,146,891.20
  4. Step 4: Simplify right side
    55,146,891.20x = 4,561,769,413,536,956
  5. Step 5: Solve for x
    x = 4,561,769,413,536,956/55,146,891.20
  6. Step 6: Final answer
    x = 82,720,336.80

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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.