Finding the Fourth Proportional to 128,348.14, 192,696.79 and 72,227.75
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Solution
The fourth proportional to 128,348.14, 192,696.79 and 72,227.75 is: 108,439.87
Step by Step Solution
- Step 1: Write the proportion equation
128,348.14 : 192,696.79 = 72,227.75 : x - Step 2: Convert to fraction form
128,348.14/192,696.79 = 72,227.75/x - Step 3: Cross multiply
128,348.14x = 192,696.79 × 72,227.75 - Step 4: Simplify right side
128,348.14x = 13,918,055,272.75 - Step 5: Solve for x
x = 13,918,055,272.75/128,348.14 - Step 6: Final answer
x = 108,439.87
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1.5x scale
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.