Finding the Fourth Proportional to 221,011.26, 304,996.78 and 129,135.94
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Solution
The fourth proportional to 221,011.26, 304,996.78 and 129,135.94 is: 178,208.32
Step by Step Solution
- Step 1: Write the proportion equation
221,011.26 : 304,996.78 = 129,135.94 : x - Step 2: Convert to fraction form
221,011.26/304,996.78 = 129,135.94/x - Step 3: Cross multiply
221,011.26x = 304,996.78 × 129,135.94 - Step 4: Simplify right side
221,011.26x = 39,386,045,882.27 - Step 5: Solve for x
x = 39,386,045,882.27/221,011.26 - Step 6: Final answer
x = 178,208.32
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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.