Finding the Fourth Proportional to 128,413.64, 177,259.56 and 114,959.96
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Solution
The fourth proportional to 128,413.64, 177,259.56 and 114,959.96 is: 158,688.38
Step by Step Solution
- Step 1: Write the proportion equation
128,413.64 : 177,259.56 = 114,959.96 : x - Step 2: Convert to fraction form
128,413.64/177,259.56 = 114,959.96/x - Step 3: Cross multiply
128,413.64x = 177,259.56 × 114,959.96 - Step 4: Simplify right side
128,413.64x = 20,377,751,927.22 - Step 5: Solve for x
x = 20,377,751,927.22/128,413.64 - Step 6: Final answer
x = 158,688.38
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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.