Finding the Fourth Proportional to 128,512.17, 177,413.36 and 80,128.44
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Solution
The fourth proportional to 128,512.17, 177,413.36 and 80,128.44 is: 110,618.75
Step by Step Solution
- Step 1: Write the proportion equation
128,512.17 : 177,413.36 = 80,128.44 : x - Step 2: Convert to fraction form
128,512.17/177,413.36 = 80,128.44/x - Step 3: Cross multiply
128,512.17x = 177,413.36 × 80,128.44 - Step 4: Simplify right side
128,512.17x = 14,215,855,371.32 - Step 5: Solve for x
x = 14,215,855,371.32/128,512.17 - Step 6: Final answer
x = 110,618.75
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1.5x scale
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.