Finding the Fourth Proportional to 221,720.68, 305,974.02 and 121,119.40
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Solution
The fourth proportional to 221,720.68, 305,974.02 and 121,119.40 is: 167,144.49
Step by Step Solution
- Step 1: Write the proportion equation
221,720.68 : 305,974.02 = 121,119.40 : x - Step 2: Convert to fraction form
221,720.68/305,974.02 = 121,119.40/x - Step 3: Cross multiply
221,720.68x = 305,974.02 × 121,119.40 - Step 4: Simplify right side
221,720.68x = 37,059,389,717.99 - Step 5: Solve for x
x = 37,059,389,717.99/221,720.68 - Step 6: Final answer
x = 167,144.49
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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.