Finding the Fourth Proportional to 136,231.24, 188,021.64 and 79,631.68
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Solution
The fourth proportional to 136,231.24, 188,021.64 and 79,631.68 is: 109,904.89
Step by Step Solution
- Step 1: Write the proportion equation
136,231.24 : 188,021.64 = 79,631.68 : x - Step 2: Convert to fraction form
136,231.24/188,021.64 = 79,631.68/x - Step 3: Cross multiply
136,231.24x = 188,021.64 × 79,631.68 - Step 4: Simplify right side
136,231.24x = 14,972,479,069.56 - Step 5: Solve for x
x = 14,972,479,069.56/136,231.24 - Step 6: Final answer
x = 109,904.89
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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.