Finding the Fourth Proportional to 128,425.50, 177,227.19 and 71,838.09
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Solution
The fourth proportional to 128,425.50, 177,227.19 and 71,838.09 is: 99,136.56
Step by Step Solution
- Step 1: Write the proportion equation
128,425.50 : 177,227.19 = 71,838.09 : x - Step 2: Convert to fraction form
128,425.50/177,227.19 = 71,838.09/x - Step 3: Cross multiply
128,425.50x = 177,227.19 × 71,838.09 - Step 4: Simplify right side
128,425.50x = 12,731,662,825.67 - Step 5: Solve for x
x = 12,731,662,825.67/128,425.50 - Step 6: Final answer
x = 99,136.56
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1.5x scale
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.