Finding the Fourth Proportional to 128,969.67, 192,407.22 and 121,994.31
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Solution
The fourth proportional to 128,969.67, 192,407.22 and 121,994.31 is: 182,000.82
Step by Step Solution
- Step 1: Write the proportion equation
128,969.67 : 192,407.22 = 121,994.31 : x - Step 2: Convert to fraction form
128,969.67/192,407.22 = 121,994.31/x - Step 3: Cross multiply
128,969.67x = 192,407.22 × 121,994.31 - Step 4: Simplify right side
128,969.67x = 23,472,586,042.92 - Step 5: Solve for x
x = 23,472,586,042.92/128,969.67 - Step 6: Final answer
x = 182,000.82
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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.