Finding the Fourth Proportional to 85,940.46, 128,914.18 and 40,938.68
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Solution
The fourth proportional to 85,940.46, 128,914.18 and 40,938.68 is: 61,409.69
Step by Step Solution
- Step 1: Write the proportion equation
85,940.46 : 128,914.18 = 40,938.68 : x - Step 2: Convert to fraction form
85,940.46/128,914.18 = 40,938.68/x - Step 3: Cross multiply
85,940.46x = 128,914.18 × 40,938.68 - Step 4: Simplify right side
85,940.46x = 5,277,576,582.42 - Step 5: Solve for x
x = 5,277,576,582.42/85,940.46 - Step 6: Final answer
x = 61,409.69
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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.