Finding the Fourth Proportional to 209,769.68, 289,503.05 and 128,093.42
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Solution
The fourth proportional to 209,769.68, 289,503.05 and 128,093.42 is: 176,781.68
Step by Step Solution
- Step 1: Write the proportion equation
209,769.68 : 289,503.05 = 128,093.42 : x - Step 2: Convert to fraction form
209,769.68/289,503.05 = 128,093.42/x - Step 3: Cross multiply
209,769.68x = 289,503.05 × 128,093.42 - Step 4: Simplify right side
209,769.68x = 37,083,435,858.22 - Step 5: Solve for x
x = 37,083,435,858.22/209,769.68 - Step 6: Final answer
x = 176,781.68
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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.