Finding the Fourth Proportional to 129,657.68, 178,938.12 and 73,072.88
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Solution
The fourth proportional to 129,657.68, 178,938.12 and 73,072.88 is: 100,846.50
Step by Step Solution
- Step 1: Write the proportion equation
129,657.68 : 178,938.12 = 73,072.88 : x - Step 2: Convert to fraction form
129,657.68/178,938.12 = 73,072.88/x - Step 3: Cross multiply
129,657.68x = 178,938.12 × 73,072.88 - Step 4: Simplify right side
129,657.68x = 13,075,523,770.19 - Step 5: Solve for x
x = 13,075,523,770.19/129,657.68 - Step 6: Final answer
x = 100,846.50
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1.5x scale
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.