Finding the Fourth Proportional to 78,651.14, 117,964.54 and 43,129.99
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Solution
The fourth proportional to 78,651.14, 117,964.54 and 43,129.99 is: 64,688.31
Step by Step Solution
- Step 1: Write the proportion equation
78,651.14 : 117,964.54 = 43,129.99 : x - Step 2: Convert to fraction form
78,651.14/117,964.54 = 43,129.99/x - Step 3: Cross multiply
78,651.14x = 117,964.54 × 43,129.99 - Step 4: Simplify right side
78,651.14x = 5,087,809,240.83 - Step 5: Solve for x
x = 5,087,809,240.83/78,651.14 - Step 6: Final answer
x = 64,688.31
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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.