Finding the Fourth Proportional to 121,247.80, 181,871.70 and 91,067.20
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Solution
The fourth proportional to 121,247.80, 181,871.70 and 91,067.20 is: 136,600.80
Step by Step Solution
- Step 1: Write the proportion equation
121,247.80 : 181,871.70 = 91,067.20 : x - Step 2: Convert to fraction form
121,247.80/181,871.70 = 91,067.20/x - Step 3: Cross multiply
121,247.80x = 181,871.70 × 91,067.20 - Step 4: Simplify right side
121,247.80x = 16,562,546,478.24 - Step 5: Solve for x
x = 16,562,546,478.24/121,247.80 - Step 6: Final answer
x = 136,600.80
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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.