Finding the Fourth Proportional to 84,586.20, 126,879.30 and 69,811.80
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Solution
The fourth proportional to 84,586.20, 126,879.30 and 69,811.80 is: 104,717.70
Step by Step Solution
- Step 1: Write the proportion equation
84,586.20 : 126,879.30 = 69,811.80 : x - Step 2: Convert to fraction form
84,586.20/126,879.30 = 69,811.80/x - Step 3: Cross multiply
84,586.20x = 126,879.30 × 69,811.80 - Step 4: Simplify right side
84,586.20x = 8,857,672,315.74 - Step 5: Solve for x
x = 8,857,672,315.74/84,586.20 - Step 6: Final answer
x = 104,717.70
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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.