Finding the Fourth Proportional to 81,720.84, 122,318.28 and 55,279.92
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Solution
The fourth proportional to 81,720.84, 122,318.28 and 55,279.92 is: 82,741.99
Step by Step Solution
- Step 1: Write the proportion equation
81,720.84 : 122,318.28 = 55,279.92 : x - Step 2: Convert to fraction form
81,720.84/122,318.28 = 55,279.92/x - Step 3: Cross multiply
81,720.84x = 122,318.28 × 55,279.92 - Step 4: Simplify right side
81,720.84x = 6,761,744,732.94 - Step 5: Solve for x
x = 6,761,744,732.94/81,720.84 - Step 6: Final answer
x = 82,741.99
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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.