Finding the Fourth Proportional to 121,220.68, 181,770.21 and 70,636.09
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Solution
The fourth proportional to 121,220.68, 181,770.21 and 70,636.09 is: 105,918.70
Step by Step Solution
- Step 1: Write the proportion equation
121,220.68 : 181,770.21 = 70,636.09 : x - Step 2: Convert to fraction form
121,220.68/181,770.21 = 70,636.09/x - Step 3: Cross multiply
121,220.68x = 181,770.21 × 70,636.09 - Step 4: Simplify right side
121,220.68x = 12,839,536,912.88 - Step 5: Solve for x
x = 12,839,536,912.88/121,220.68 - Step 6: Final answer
x = 105,918.70
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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.