Finding the Fourth Proportional to 138,906.40, 208,279.12 and 122,299.80
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Solution
The fourth proportional to 138,906.40, 208,279.12 and 122,299.80 is: 183,378.84
Step by Step Solution
- Step 1: Write the proportion equation
138,906.40 : 208,279.12 = 122,299.80 : x - Step 2: Convert to fraction form
138,906.40/208,279.12 = 122,299.80/x - Step 3: Cross multiply
138,906.40x = 208,279.12 × 122,299.80 - Step 4: Simplify right side
138,906.40x = 25,472,494,720.18 - Step 5: Solve for x
x = 25,472,494,720.18/138,906.40 - Step 6: Final answer
x = 183,378.84
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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.