Finding the Fourth Proportional to 128,528.70, 177,370.48 and 74,845.02
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Solution
The fourth proportional to 128,528.70, 177,370.48 and 74,845.02 is: 103,286.64
Step by Step Solution
- Step 1: Write the proportion equation
128,528.70 : 177,370.48 = 74,845.02 : x - Step 2: Convert to fraction form
128,528.70/177,370.48 = 74,845.02/x - Step 3: Cross multiply
128,528.70x = 177,370.48 × 74,845.02 - Step 4: Simplify right side
128,528.70x = 13,275,297,123.01 - Step 5: Solve for x
x = 13,275,297,123.01/128,528.70 - Step 6: Final answer
x = 103,286.64
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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.