Finding the Fourth Proportional to 121,932.20, 168,323.96 and 91,729.02
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Solution
The fourth proportional to 121,932.20, 168,323.96 and 91,729.02 is: 126,629.32
Step by Step Solution
- Step 1: Write the proportion equation
121,932.20 : 168,323.96 = 91,729.02 : x - Step 2: Convert to fraction form
121,932.20/168,323.96 = 91,729.02/x - Step 3: Cross multiply
121,932.20x = 168,323.96 × 91,729.02 - Step 4: Simplify right side
121,932.20x = 15,440,191,434.67 - Step 5: Solve for x
x = 15,440,191,434.67/121,932.20 - Step 6: Final answer
x = 126,629.32
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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.