Finding the Fourth Proportional to 117,643.20, 176,464.80 and 91,428.80
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Solution
The fourth proportional to 117,643.20, 176,464.80 and 91,428.80 is: 137,143.20
Step by Step Solution
- Step 1: Write the proportion equation
117,643.20 : 176,464.80 = 91,428.80 : x - Step 2: Convert to fraction form
117,643.20/176,464.80 = 91,428.80/x - Step 3: Cross multiply
117,643.20x = 176,464.80 × 91,428.80 - Step 4: Simplify right side
117,643.20x = 16,133,964,906.24 - Step 5: Solve for x
x = 16,133,964,906.24/117,643.20 - Step 6: Final answer
x = 137,143.20
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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.