Finding the Fourth Proportional to 81,002.20, 121,544.28 and 54,651.56
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Solution
The fourth proportional to 81,002.20, 121,544.28 and 54,651.56 is: 82,004.99
Step by Step Solution
- Step 1: Write the proportion equation
81,002.20 : 121,544.28 = 54,651.56 : x - Step 2: Convert to fraction form
81,002.20/121,544.28 = 54,651.56/x - Step 3: Cross multiply
81,002.20x = 121,544.28 × 54,651.56 - Step 4: Simplify right side
81,002.20x = 6,642,584,511.08 - Step 5: Solve for x
x = 6,642,584,511.08/81,002.20 - Step 6: Final answer
x = 82,004.99
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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.