Finding the Fourth Proportional to 86,178.84, 129,284.15 and 38,795.09
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Solution
The fourth proportional to 86,178.84, 129,284.15 and 38,795.09 is: 58,199.78
Step by Step Solution
- Step 1: Write the proportion equation
86,178.84 : 129,284.15 = 38,795.09 : x - Step 2: Convert to fraction form
86,178.84/129,284.15 = 38,795.09/x - Step 3: Cross multiply
86,178.84x = 129,284.15 × 38,795.09 - Step 4: Simplify right side
86,178.84x = 5,015,589,394.43 - Step 5: Solve for x
x = 5,015,589,394.43/86,178.84 - Step 6: Final answer
x = 58,199.78
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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.