Finding the Fourth Proportional to 207,921.90, 311,881.94 and 81,472.80
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Solution
The fourth proportional to 207,921.90, 311,881.94 and 81,472.80 is: 122,208.84
Step by Step Solution
- Step 1: Write the proportion equation
207,921.90 : 311,881.94 = 81,472.80 : x - Step 2: Convert to fraction form
207,921.90/311,881.94 = 81,472.80/x - Step 3: Cross multiply
207,921.90x = 311,881.94 × 81,472.80 - Step 4: Simplify right side
207,921.90x = 25,409,894,921.23 - Step 5: Solve for x
x = 25,409,894,921.23/207,921.90 - Step 6: Final answer
x = 122,208.84
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.