Finding the Fourth Proportional to 121,437.46, 182,218.17 and 81,911.68
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Solution
The fourth proportional to 121,437.46, 182,218.17 and 81,911.68 is: 122,909.33
Step by Step Solution
- Step 1: Write the proportion equation
121,437.46 : 182,218.17 = 81,911.68 : x - Step 2: Convert to fraction form
121,437.46/182,218.17 = 81,911.68/x - Step 3: Cross multiply
121,437.46x = 182,218.17 × 81,911.68 - Step 4: Simplify right side
121,437.46x = 14,925,796,431.23 - Step 5: Solve for x
x = 14,925,796,431.23/121,437.46 - Step 6: Final answer
x = 122,909.33
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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.