Finding the Fourth Proportional to 100,391.05, 138,546.68 and 57,376.88
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Solution
The fourth proportional to 100,391.05, 138,546.68 and 57,376.88 is: 79,184.11
Step by Step Solution
- Step 1: Write the proportion equation
100,391.05 : 138,546.68 = 57,376.88 : x - Step 2: Convert to fraction form
100,391.05/138,546.68 = 57,376.88/x - Step 3: Cross multiply
100,391.05x = 138,546.68 × 57,376.88 - Step 4: Simplify right side
100,391.05x = 7,949,376,232.76 - Step 5: Solve for x
x = 7,949,376,232.76/100,391.05 - Step 6: Final answer
x = 79,184.11
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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.