Finding the Fourth Proportional to 198,129.12, 273,413.40 and 109,721.88
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Solution
The fourth proportional to 198,129.12, 273,413.40 and 109,721.88 is: 151,413.54
Step by Step Solution
- Step 1: Write the proportion equation
198,129.12 : 273,413.40 = 109,721.88 : x - Step 2: Convert to fraction form
198,129.12/273,413.40 = 109,721.88/x - Step 3: Cross multiply
198,129.12x = 273,413.40 × 109,721.88 - Step 4: Simplify right side
198,129.12x = 29,999,432,265.19 - Step 5: Solve for x
x = 29,999,432,265.19/198,129.12 - Step 6: Final answer
x = 151,413.54
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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.