Finding the Fourth Proportional to 81,413.91, 122,120.87 and 39,831.75
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Solution
The fourth proportional to 81,413.91, 122,120.87 and 39,831.75 is: 59,747.63
Step by Step Solution
- Step 1: Write the proportion equation
81,413.91 : 122,120.87 = 39,831.75 : x - Step 2: Convert to fraction form
81,413.91/122,120.87 = 39,831.75/x - Step 3: Cross multiply
81,413.91x = 122,120.87 × 39,831.75 - Step 4: Simplify right side
81,413.91x = 4,864,287,764.46 - Step 5: Solve for x
x = 4,864,287,764.46/81,413.91 - Step 6: Final answer
x = 59,747.63
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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.