Finding the Fourth Proportional to 76,929.36, 115,327.80 and 30,171.12
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Solution
The fourth proportional to 76,929.36, 115,327.80 and 30,171.12 is: 45,230.70
Step by Step Solution
- Step 1: Write the proportion equation
76,929.36 : 115,327.80 = 30,171.12 : x - Step 2: Convert to fraction form
76,929.36/115,327.80 = 30,171.12/x - Step 3: Cross multiply
76,929.36x = 115,327.80 × 30,171.12 - Step 4: Simplify right side
76,929.36x = 3,479,568,893.14 - Step 5: Solve for x
x = 3,479,568,893.14/76,929.36 - Step 6: Final answer
x = 45,230.70
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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.