Finding the Fourth Proportional to 121,609.20, 182,413.80 and 99,739.20
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Solution
The fourth proportional to 121,609.20, 182,413.80 and 99,739.20 is: 149,608.80
Step by Step Solution
- Step 1: Write the proportion equation
121,609.20 : 182,413.80 = 99,739.20 : x - Step 2: Convert to fraction form
121,609.20/182,413.80 = 99,739.20/x - Step 3: Cross multiply
121,609.20x = 182,413.80 × 99,739.20 - Step 4: Simplify right side
121,609.20x = 18,193,806,480.96 - Step 5: Solve for x
x = 18,193,806,480.96/121,609.20 - Step 6: Final answer
x = 149,608.80
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1.5x scale
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.