Finding the Fourth Proportional to 100,991.73, 139,363.16 and 55,660.68
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Solution
The fourth proportional to 100,991.73, 139,363.16 and 55,660.68 is: 76,808.75
Step by Step Solution
- Step 1: Write the proportion equation
100,991.73 : 139,363.16 = 55,660.68 : x - Step 2: Convert to fraction form
100,991.73/139,363.16 = 55,660.68/x - Step 3: Cross multiply
100,991.73x = 139,363.16 × 55,660.68 - Step 4: Simplify right side
100,991.73x = 7,757,048,252.55 - Step 5: Solve for x
x = 7,757,048,252.55/100,991.73 - Step 6: Final answer
x = 76,808.75
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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.