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Finding the Fourth Proportional to 21,909,901.60, 32,790,202.80 and 21,909,901.60

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Solution

The fourth proportional to 21,909,901.60, 32,790,202.80 and 21,909,901.60 is: 32,790,202.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909,901.60 : 32,790,202.80 = 21,909,901.60 : x
  2. Step 2: Convert to fraction form
    21,909,901.60/32,790,202.80 = 21,909,901.60/x
  3. Step 3: Cross multiply
    21,909,901.60x = 32,790,202.80 × 21,909,901.60
  4. Step 4: Simplify right side
    21,909,901.60x = 718,430,116,792,044.50
  5. Step 5: Solve for x
    x = 718,430,116,792,044.50/21,909,901.60
  6. Step 6: Final answer
    x = 32,790,202.80

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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.