Finding the Fourth Proportional to 128,968.67, 192,405.73 and 121,993.31
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Solution
The fourth proportional to 128,968.67, 192,405.73 and 121,993.31 is: 181,999.33
Step by Step Solution
- Step 1: Write the proportion equation
128,968.67 : 192,405.73 = 121,993.31 : x - Step 2: Convert to fraction form
128,968.67/192,405.73 = 121,993.31/x - Step 3: Cross multiply
128,968.67x = 192,405.73 × 121,993.31 - Step 4: Simplify right side
128,968.67x = 23,472,211,865.67 - Step 5: Solve for x
x = 23,472,211,865.67/128,968.67 - Step 6: Final answer
x = 181,999.33
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.