Finding the Fourth Proportional to 128,081.97, 176,752.44 and 74,380.19
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Solution
The fourth proportional to 128,081.97, 176,752.44 and 74,380.19 is: 102,644.26
Step by Step Solution
- Step 1: Write the proportion equation
128,081.97 : 176,752.44 = 74,380.19 : x - Step 2: Convert to fraction form
128,081.97/176,752.44 = 74,380.19/x - Step 3: Cross multiply
128,081.97x = 176,752.44 × 74,380.19 - Step 4: Simplify right side
128,081.97x = 13,146,879,186.40 - Step 5: Solve for x
x = 13,146,879,186.40/128,081.97 - Step 6: Final answer
x = 102,644.26
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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.