Finding the Fourth Proportional to 221,172.69, 305,129.64 and 139,474.08
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Solution
The fourth proportional to 221,172.69, 305,129.64 and 139,474.08 is: 192,418.31
Step by Step Solution
- Step 1: Write the proportion equation
221,172.69 : 305,129.64 = 139,474.08 : x - Step 2: Convert to fraction form
221,172.69/305,129.64 = 139,474.08/x - Step 3: Cross multiply
221,172.69x = 305,129.64 × 139,474.08 - Step 4: Simplify right side
221,172.69x = 42,557,675,819.73 - Step 5: Solve for x
x = 42,557,675,819.73/221,172.69 - Step 6: Final answer
x = 192,418.31
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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.