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Finding the Fourth Proportional to 71,413.56, 98,549.46 and 39,147.90

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Solution

The fourth proportional to 71,413.56, 98,549.46 and 39,147.90 is: 54,023.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,413.56 : 98,549.46 = 39,147.90 : x
  2. Step 2: Convert to fraction form
    71,413.56/98,549.46 = 39,147.90/x
  3. Step 3: Cross multiply
    71,413.56x = 98,549.46 × 39,147.90
  4. Step 4: Simplify right side
    71,413.56x = 3,858,004,405.13
  5. Step 5: Solve for x
    x = 3,858,004,405.13/71,413.56
  6. Step 6: Final answer
    x = 54,023.42

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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.