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Finding the Fourth Proportional to 60,399.87, 90,577.11 and 20,947.47

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Solution

The fourth proportional to 60,399.87, 90,577.11 and 20,947.47 is: 31,413.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,399.87 : 90,577.11 = 20,947.47 : x
  2. Step 2: Convert to fraction form
    60,399.87/90,577.11 = 20,947.47/x
  3. Step 3: Cross multiply
    60,399.87x = 90,577.11 × 20,947.47
  4. Step 4: Simplify right side
    60,399.87x = 1,897,361,294.41
  5. Step 5: Solve for x
    x = 1,897,361,294.41/60,399.87
  6. Step 6: Final answer
    x = 31,413.33

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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.