Finding the Fourth Proportional to 231,137.99, 318,964.28 and 129,164.28
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Solution
The fourth proportional to 231,137.99, 318,964.28 and 129,164.28 is: 178,243.27
Step by Step Solution
- Step 1: Write the proportion equation
231,137.99 : 318,964.28 = 129,164.28 : x - Step 2: Convert to fraction form
231,137.99/318,964.28 = 129,164.28/x - Step 3: Cross multiply
231,137.99x = 318,964.28 × 129,164.28 - Step 4: Simplify right side
231,137.99x = 41,198,790,926.10 - Step 5: Solve for x
x = 41,198,790,926.10/231,137.99 - Step 6: Final answer
x = 178,243.27
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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.