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Finding the Fourth Proportional to 72,003.80, 108,054.30 and 40,413.80

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Solution

The fourth proportional to 72,003.80, 108,054.30 and 40,413.80 is: 60,647.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,003.80 : 108,054.30 = 40,413.80 : x
  2. Step 2: Convert to fraction form
    72,003.80/108,054.30 = 40,413.80/x
  3. Step 3: Cross multiply
    72,003.80x = 108,054.30 × 40,413.80
  4. Step 4: Simplify right side
    72,003.80x = 4,366,884,869.34
  5. Step 5: Solve for x
    x = 4,366,884,869.34/72,003.80
  6. Step 6: Final answer
    x = 60,647.98

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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.