Finding the Fourth Proportional to 100,696.42, 138,960.86 and 57,689.84
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Solution
The fourth proportional to 100,696.42, 138,960.86 and 57,689.84 is: 79,611.86
Step by Step Solution
- Step 1: Write the proportion equation
100,696.42 : 138,960.86 = 57,689.84 : x - Step 2: Convert to fraction form
100,696.42/138,960.86 = 57,689.84/x - Step 3: Cross multiply
100,696.42x = 138,960.86 × 57,689.84 - Step 4: Simplify right side
100,696.42x = 8,016,629,779.66 - Step 5: Solve for x
x = 8,016,629,779.66/100,696.42 - Step 6: Final answer
x = 79,611.86
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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.