Finding the Fourth Proportional to 66,922.99, 100,379.79 and 31,392.10
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Solution
The fourth proportional to 66,922.99, 100,379.79 and 31,392.10 is: 47,085.95
Step by Step Solution
- Step 1: Write the proportion equation
66,922.99 : 100,379.79 = 31,392.10 : x - Step 2: Convert to fraction form
66,922.99/100,379.79 = 31,392.10/x - Step 3: Cross multiply
66,922.99x = 100,379.79 × 31,392.10 - Step 4: Simplify right side
66,922.99x = 3,151,132,405.66 - Step 5: Solve for x
x = 3,151,132,405.66/66,922.99 - Step 6: Final answer
x = 47,085.95
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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.