Finding the Fourth Proportional to 76,939.12, 106,223.98 and 49,729.44
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Solution
The fourth proportional to 76,939.12, 106,223.98 and 49,729.44 is: 68,657.66
Step by Step Solution
- Step 1: Write the proportion equation
76,939.12 : 106,223.98 = 49,729.44 : x - Step 2: Convert to fraction form
76,939.12/106,223.98 = 49,729.44/x - Step 3: Cross multiply
76,939.12x = 106,223.98 × 49,729.44 - Step 4: Simplify right side
76,939.12x = 5,282,459,547.09 - Step 5: Solve for x
x = 5,282,459,547.09/76,939.12 - Step 6: Final answer
x = 68,657.66
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.