Finding the Fourth Proportional to 138,617.24, 191,293.99 and 78,189.08
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Solution
The fourth proportional to 138,617.24, 191,293.99 and 78,189.08 is: 107,902.17
Step by Step Solution
- Step 1: Write the proportion equation
138,617.24 : 191,293.99 = 78,189.08 : x - Step 2: Convert to fraction form
138,617.24/191,293.99 = 78,189.08/x - Step 3: Cross multiply
138,617.24x = 191,293.99 × 78,189.08 - Step 4: Simplify right side
138,617.24x = 14,957,100,413.92 - Step 5: Solve for x
x = 14,957,100,413.92/138,617.24 - Step 6: Final answer
x = 107,902.17
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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.