Finding the Fourth Proportional to 225,988.12, 311,863.57 and 129,194.07
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Solution
The fourth proportional to 225,988.12, 311,863.57 and 129,194.07 is: 178,287.80
Step by Step Solution
- Step 1: Write the proportion equation
225,988.12 : 311,863.57 = 129,194.07 : x - Step 2: Convert to fraction form
225,988.12/311,863.57 = 129,194.07/x - Step 3: Cross multiply
225,988.12x = 311,863.57 × 129,194.07 - Step 4: Simplify right side
225,988.12x = 40,290,923,893.03 - Step 5: Solve for x
x = 40,290,923,893.03/225,988.12 - Step 6: Final answer
x = 178,287.80
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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.