Finding the Fourth Proportional to 107,696.40, 161,717.40 and 72,790.80
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Solution
The fourth proportional to 107,696.40, 161,717.40 and 72,790.80 is: 109,302.99
Step by Step Solution
- Step 1: Write the proportion equation
107,696.40 : 161,717.40 = 72,790.80 : x - Step 2: Convert to fraction form
107,696.40/161,717.40 = 72,790.80/x - Step 3: Cross multiply
107,696.40x = 161,717.40 × 72,790.80 - Step 4: Simplify right side
107,696.40x = 11,771,538,919.92 - Step 5: Solve for x
x = 11,771,538,919.92/107,696.40 - Step 6: Final answer
x = 109,302.99
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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.