Finding the Fourth Proportional to 76,989.84, 115,464.36 and 30,243.12
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Solution
The fourth proportional to 76,989.84, 115,464.36 and 30,243.12 is: 45,356.67
Step by Step Solution
- Step 1: Write the proportion equation
76,989.84 : 115,464.36 = 30,243.12 : x - Step 2: Convert to fraction form
76,989.84/115,464.36 = 30,243.12/x - Step 3: Cross multiply
76,989.84x = 115,464.36 × 30,243.12 - Step 4: Simplify right side
76,989.84x = 3,492,002,495.20 - Step 5: Solve for x
x = 3,492,002,495.20/76,989.84 - Step 6: Final answer
x = 45,356.67
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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.