Finding the Fourth Proportional to 129,360.42, 178,542.02 and 72,771.80
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Solution
The fourth proportional to 129,360.42, 178,542.02 and 72,771.80 is: 100,438.94
Step by Step Solution
- Step 1: Write the proportion equation
129,360.42 : 178,542.02 = 72,771.80 : x - Step 2: Convert to fraction form
129,360.42/178,542.02 = 72,771.80/x - Step 3: Cross multiply
129,360.42x = 178,542.02 × 72,771.80 - Step 4: Simplify right side
129,360.42x = 12,992,822,914.47 - Step 5: Solve for x
x = 12,992,822,914.47/129,360.42 - Step 6: Final answer
x = 100,438.94
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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.