Finding the Fourth Proportional to 128,821.20, 193,231.80 and 114,046.80
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Solution
The fourth proportional to 128,821.20, 193,231.80 and 114,046.80 is: 171,070.20
Step by Step Solution
- Step 1: Write the proportion equation
128,821.20 : 193,231.80 = 114,046.80 : x - Step 2: Convert to fraction form
128,821.20/193,231.80 = 114,046.80/x - Step 3: Cross multiply
128,821.20x = 193,231.80 × 114,046.80 - Step 4: Simplify right side
128,821.20x = 22,037,468,448.24 - Step 5: Solve for x
x = 22,037,468,448.24/128,821.20 - Step 6: Final answer
x = 171,070.20
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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.