Finding the Fourth Proportional to 138,329.20, 207,493.80 and 135,413.20
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Solution
The fourth proportional to 138,329.20, 207,493.80 and 135,413.20 is: 203,119.80
Step by Step Solution
- Step 1: Write the proportion equation
138,329.20 : 207,493.80 = 135,413.20 : x - Step 2: Convert to fraction form
138,329.20/207,493.80 = 135,413.20/x - Step 3: Cross multiply
138,329.20x = 207,493.80 × 135,413.20 - Step 4: Simplify right side
138,329.20x = 28,097,399,438.16 - Step 5: Solve for x
x = 28,097,399,438.16/138,329.20 - Step 6: Final answer
x = 203,119.80
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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.