Finding the Fourth Proportional to 100,969.36, 139,338.70 and 55,647.43
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Solution
The fourth proportional to 100,969.36, 139,338.70 and 55,647.43 is: 76,793.99
Step by Step Solution
- Step 1: Write the proportion equation
100,969.36 : 139,338.70 = 55,647.43 : x - Step 2: Convert to fraction form
100,969.36/139,338.70 = 55,647.43/x - Step 3: Cross multiply
100,969.36x = 139,338.70 × 55,647.43 - Step 4: Simplify right side
100,969.36x = 7,753,840,067.08 - Step 5: Solve for x
x = 7,753,840,067.08/100,969.36 - Step 6: Final answer
x = 76,793.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.