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Finding the Fourth Proportional to 108,605,220.80, 162,907,831.20 and 108,605,220.80

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Solution

The fourth proportional to 108,605,220.80, 162,907,831.20 and 108,605,220.80 is: 162,907,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,605,220.80 : 162,907,831.20 = 108,605,220.80 : x
  2. Step 2: Convert to fraction form
    108,605,220.80/162,907,831.20 = 108,605,220.80/x
  3. Step 3: Cross multiply
    108,605,220.80x = 162,907,831.20 × 108,605,220.80
  4. Step 4: Simplify right side
    108,605,220.80x = 17,692,640,977,525,128
  5. Step 5: Solve for x
    x = 17,692,640,977,525,128/108,605,220.80
  6. Step 6: Final answer
    x = 162,907,831.20

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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.