Finding the Fourth Proportional to 139,969.48, 193,163.94 and 76,310.92
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Solution
The fourth proportional to 139,969.48, 193,163.94 and 76,310.92 is: 105,312.37
Step by Step Solution
- Step 1: Write the proportion equation
139,969.48 : 193,163.94 = 76,310.92 : x - Step 2: Convert to fraction form
139,969.48/193,163.94 = 76,310.92/x - Step 3: Cross multiply
139,969.48x = 193,163.94 × 76,310.92 - Step 4: Simplify right side
139,969.48x = 14,740,517,972.22 - Step 5: Solve for x
x = 14,740,517,972.22/139,969.48 - Step 6: Final answer
x = 105,312.37
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1.5x scale
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.