Finding the Fourth Proportional to 221,602.75, 305,812.62 and 121,000.75
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Solution
The fourth proportional to 221,602.75, 305,812.62 and 121,000.75 is: 166,981.49
Step by Step Solution
- Step 1: Write the proportion equation
221,602.75 : 305,812.62 = 121,000.75 : x - Step 2: Convert to fraction form
221,602.75/305,812.62 = 121,000.75/x - Step 3: Cross multiply
221,602.75x = 305,812.62 × 121,000.75 - Step 4: Simplify right side
221,602.75x = 37,003,556,379.47 - Step 5: Solve for x
x = 37,003,556,379.47/221,602.75 - Step 6: Final answer
x = 166,981.49
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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.