Finding the Fourth Proportional to 115,440.80, 173,161.20 and 91,821.20
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Solution
The fourth proportional to 115,440.80, 173,161.20 and 91,821.20 is: 137,731.80
Step by Step Solution
- Step 1: Write the proportion equation
115,440.80 : 173,161.20 = 91,821.20 : x - Step 2: Convert to fraction form
115,440.80/173,161.20 = 91,821.20/x - Step 3: Cross multiply
115,440.80x = 173,161.20 × 91,821.20 - Step 4: Simplify right side
115,440.80x = 15,899,869,177.44 - Step 5: Solve for x
x = 15,899,869,177.44/115,440.80 - Step 6: Final answer
x = 137,731.80
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1.5x scale
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.