Finding the Fourth Proportional to 81,964.80, 122,716.80 and 79,660.80
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Solution
The fourth proportional to 81,964.80, 122,716.80 and 79,660.80 is: 119,267.28
Step by Step Solution
- Step 1: Write the proportion equation
81,964.80 : 122,716.80 = 79,660.80 : x - Step 2: Convert to fraction form
81,964.80/122,716.80 = 79,660.80/x - Step 3: Cross multiply
81,964.80x = 122,716.80 × 79,660.80 - Step 4: Simplify right side
81,964.80x = 9,775,718,461.44 - Step 5: Solve for x
x = 9,775,718,461.44/81,964.80 - Step 6: Final answer
x = 119,267.28
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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.