Finding the Fourth Proportional to 128,442.99, 177,286.99 and 74,738.42
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Solution
The fourth proportional to 128,442.99, 177,286.99 and 74,738.42 is: 103,159.77
Step by Step Solution
- Step 1: Write the proportion equation
128,442.99 : 177,286.99 = 74,738.42 : x - Step 2: Convert to fraction form
128,442.99/177,286.99 = 74,738.42/x - Step 3: Cross multiply
128,442.99x = 177,286.99 × 74,738.42 - Step 4: Simplify right side
128,442.99x = 13,250,149,519.16 - Step 5: Solve for x
x = 13,250,149,519.16/128,442.99 - Step 6: Final answer
x = 103,159.77
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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.