Finding the Fourth Proportional to 81,855.84, 122,186.16 and 70,243.68
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Solution
The fourth proportional to 81,855.84, 122,186.16 and 70,243.68 is: 104,852.70
Step by Step Solution
- Step 1: Write the proportion equation
81,855.84 : 122,186.16 = 70,243.68 : x - Step 2: Convert to fraction form
81,855.84/122,186.16 = 70,243.68/x - Step 3: Cross multiply
81,855.84x = 122,186.16 × 70,243.68 - Step 4: Simplify right side
81,855.84x = 8,582,805,523.47 - Step 5: Solve for x
x = 8,582,805,523.47/81,855.84 - Step 6: Final answer
x = 104,852.70
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.