Finding the Fourth Proportional to 91,247.70, 136,756.35 and 80,879.70
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Solution
The fourth proportional to 91,247.70, 136,756.35 and 80,879.70 is: 121,217.44
Step by Step Solution
- Step 1: Write the proportion equation
91,247.70 : 136,756.35 = 80,879.70 : x - Step 2: Convert to fraction form
91,247.70/136,756.35 = 80,879.70/x - Step 3: Cross multiply
91,247.70x = 136,756.35 × 80,879.70 - Step 4: Simplify right side
91,247.70x = 11,060,812,561.10 - Step 5: Solve for x
x = 11,060,812,561.10/91,247.70 - Step 6: Final answer
x = 121,217.44
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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.