Finding the Fourth Proportional to 128,122.40, 192,183.60 and 121,998.80
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Solution
The fourth proportional to 128,122.40, 192,183.60 and 121,998.80 is: 182,998.20
Step by Step Solution
- Step 1: Write the proportion equation
128,122.40 : 192,183.60 = 121,998.80 : x - Step 2: Convert to fraction form
128,122.40/192,183.60 = 121,998.80/x - Step 3: Cross multiply
128,122.40x = 192,183.60 × 121,998.80 - Step 4: Simplify right side
128,122.40x = 23,446,168,579.68 - Step 5: Solve for x
x = 23,446,168,579.68/128,122.40 - Step 6: Final answer
x = 182,998.20
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1.5x scale
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.