Finding the Fourth Proportional to 342,678.60, 513,938.93 and 129,469.19
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Solution
The fourth proportional to 342,678.60, 513,938.93 and 129,469.19 is: 194,173.94
Step by Step Solution
- Step 1: Write the proportion equation
342,678.60 : 513,938.93 = 129,469.19 : x - Step 2: Convert to fraction form
342,678.60/513,938.93 = 129,469.19/x - Step 3: Cross multiply
342,678.60x = 513,938.93 × 129,469.19 - Step 4: Simplify right side
342,678.60x = 66,539,253,759.53 - Step 5: Solve for x
x = 66,539,253,759.53/342,678.60 - Step 6: Final answer
x = 194,173.94
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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.