Finding the Fourth Proportional to 139,245.84, 192,163.68 and 78,815.40
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Solution
The fourth proportional to 139,245.84, 192,163.68 and 78,815.40 is: 108,767.75
Step by Step Solution
- Step 1: Write the proportion equation
139,245.84 : 192,163.68 = 78,815.40 : x - Step 2: Convert to fraction form
139,245.84/192,163.68 = 78,815.40/x - Step 3: Cross multiply
139,245.84x = 192,163.68 × 78,815.40 - Step 4: Simplify right side
139,245.84x = 15,145,457,304.67 - Step 5: Solve for x
x = 15,145,457,304.67/139,245.84 - Step 6: Final answer
x = 108,767.75
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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.