Finding the Fourth Proportional to 128,939.84, 177,891.36 and 84,253.76
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Solution
The fourth proportional to 128,939.84, 177,891.36 and 84,253.76 is: 116,240.38
Step by Step Solution
- Step 1: Write the proportion equation
128,939.84 : 177,891.36 = 84,253.76 : x - Step 2: Convert to fraction form
128,939.84/177,891.36 = 84,253.76/x - Step 3: Cross multiply
128,939.84x = 177,891.36 × 84,253.76 - Step 4: Simplify right side
128,939.84x = 14,988,015,951.51 - Step 5: Solve for x
x = 14,988,015,951.51/128,939.84 - Step 6: Final answer
x = 116,240.38
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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.