Finding the Fourth Proportional to 121,858.40, 168,163.44 and 68,142.80
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Solution
The fourth proportional to 121,858.40, 168,163.44 and 68,142.80 is: 94,036.42
Step by Step Solution
- Step 1: Write the proportion equation
121,858.40 : 168,163.44 = 68,142.80 : x - Step 2: Convert to fraction form
121,858.40/168,163.44 = 68,142.80/x - Step 3: Cross multiply
121,858.40x = 168,163.44 × 68,142.80 - Step 4: Simplify right side
121,858.40x = 11,459,127,659.23 - Step 5: Solve for x
x = 11,459,127,659.23/121,858.40 - Step 6: Final answer
x = 94,036.42
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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.