Finding the Fourth Proportional to 128,388.51, 192,665.39 and 69,264.99
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Solution
The fourth proportional to 128,388.51, 192,665.39 and 69,264.99 is: 103,942.06
Step by Step Solution
- Step 1: Write the proportion equation
128,388.51 : 192,665.39 = 69,264.99 : x - Step 2: Convert to fraction form
128,388.51/192,665.39 = 69,264.99/x - Step 3: Cross multiply
128,388.51x = 192,665.39 × 69,264.99 - Step 4: Simplify right side
128,388.51x = 13,344,966,311.70 - Step 5: Solve for x
x = 13,344,966,311.70/128,388.51 - Step 6: Final answer
x = 103,942.06
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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.