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Finding the Fourth Proportional to 111,163.45, 153,391.11 and 63,413.95

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Solution

The fourth proportional to 111,163.45, 153,391.11 and 63,413.95 is: 87,503.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,163.45 : 153,391.11 = 63,413.95 : x
  2. Step 2: Convert to fraction form
    111,163.45/153,391.11 = 63,413.95/x
  3. Step 3: Cross multiply
    111,163.45x = 153,391.11 × 63,413.95
  4. Step 4: Simplify right side
    111,163.45x = 9,727,136,179.98
  5. Step 5: Solve for x
    x = 9,727,136,179.98/111,163.45
  6. Step 6: Final answer
    x = 87,503.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.