Finding the Fourth Proportional to 128,664.20, 192,996.30 and 121,447.10
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Solution
The fourth proportional to 128,664.20, 192,996.30 and 121,447.10 is: 182,170.65
Step by Step Solution
- Step 1: Write the proportion equation
128,664.20 : 192,996.30 = 121,447.10 : x - Step 2: Convert to fraction form
128,664.20/192,996.30 = 121,447.10/x - Step 3: Cross multiply
128,664.20x = 192,996.30 × 121,447.10 - Step 4: Simplify right side
128,664.20x = 23,438,840,945.73 - Step 5: Solve for x
x = 23,438,840,945.73/128,664.20 - Step 6: Final answer
x = 182,170.65
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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.