Finding the Fourth Proportional to 128,538.30, 192,721.05 and 68,576.70
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Solution
The fourth proportional to 128,538.30, 192,721.05 and 68,576.70 is: 102,818.95
Step by Step Solution
- Step 1: Write the proportion equation
128,538.30 : 192,721.05 = 68,576.70 : x - Step 2: Convert to fraction form
128,538.30/192,721.05 = 68,576.70/x - Step 3: Cross multiply
128,538.30x = 192,721.05 × 68,576.70 - Step 4: Simplify right side
128,538.30x = 13,216,173,629.54 - Step 5: Solve for x
x = 13,216,173,629.54/128,538.30 - Step 6: Final answer
x = 102,818.95
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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.