Finding the Fourth Proportional to 68,629.20, 102,895.20 and 31,207.20
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Solution
The fourth proportional to 68,629.20, 102,895.20 and 31,207.20 is: 46,788.70
Step by Step Solution
- Step 1: Write the proportion equation
68,629.20 : 102,895.20 = 31,207.20 : x - Step 2: Convert to fraction form
68,629.20/102,895.20 = 31,207.20/x - Step 3: Cross multiply
68,629.20x = 102,895.20 × 31,207.20 - Step 4: Simplify right side
68,629.20x = 3,211,071,085.44 - Step 5: Solve for x
x = 3,211,071,085.44/68,629.20 - Step 6: Final answer
x = 46,788.70
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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.