Finding the Fourth Proportional to 121,163.70, 181,745.55 and 61,979.70
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Solution
The fourth proportional to 121,163.70, 181,745.55 and 61,979.70 is: 92,969.55
Step by Step Solution
- Step 1: Write the proportion equation
121,163.70 : 181,745.55 = 61,979.70 : x - Step 2: Convert to fraction form
121,163.70/181,745.55 = 61,979.70/x - Step 3: Cross multiply
121,163.70x = 181,745.55 × 61,979.70 - Step 4: Simplify right side
121,163.70x = 11,264,534,665.34 - Step 5: Solve for x
x = 11,264,534,665.34/121,163.70 - Step 6: Final answer
x = 92,969.55
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1.5x scale
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.