Finding the Fourth Proportional to 76,690.64, 115,018.68 and 29,919.44
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Solution
The fourth proportional to 76,690.64, 115,018.68 and 29,919.44 is: 44,872.42
Step by Step Solution
- Step 1: Write the proportion equation
76,690.64 : 115,018.68 = 29,919.44 : x - Step 2: Convert to fraction form
76,690.64/115,018.68 = 29,919.44/x - Step 3: Cross multiply
76,690.64x = 115,018.68 × 29,919.44 - Step 4: Simplify right side
76,690.64x = 3,441,294,495.14 - Step 5: Solve for x
x = 3,441,294,495.14/76,690.64 - Step 6: Final answer
x = 44,872.42
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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.