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Finding the Fourth Proportional to 19,788,921.20, 29,636,142.60 and 19,788,921.20

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Solution

The fourth proportional to 19,788,921.20, 29,636,142.60 and 19,788,921.20 is: 29,636,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,788,921.20 : 29,636,142.60 = 19,788,921.20 : x
  2. Step 2: Convert to fraction form
    19,788,921.20/29,636,142.60 = 19,788,921.20/x
  3. Step 3: Cross multiply
    19,788,921.20x = 29,636,142.60 × 19,788,921.20
  4. Step 4: Simplify right side
    19,788,921.20x = 586,467,290,583,363.12
  5. Step 5: Solve for x
    x = 586,467,290,583,363.12/19,788,921.20
  6. Step 6: Final answer
    x = 29,636,142.60

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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.