Finding the Fourth Proportional to 76,497.20, 114,745.80 and 68,721.20
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Solution
The fourth proportional to 76,497.20, 114,745.80 and 68,721.20 is: 103,081.80
Step by Step Solution
- Step 1: Write the proportion equation
76,497.20 : 114,745.80 = 68,721.20 : x - Step 2: Convert to fraction form
76,497.20/114,745.80 = 68,721.20/x - Step 3: Cross multiply
76,497.20x = 114,745.80 × 68,721.20 - Step 4: Simplify right side
76,497.20x = 7,885,469,070.96 - Step 5: Solve for x
x = 7,885,469,070.96/76,497.20 - Step 6: Final answer
x = 103,081.80
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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.