Finding the Fourth Proportional to 139,625.46, 192,674.99 and 78,365.96
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Solution
The fourth proportional to 139,625.46, 192,674.99 and 78,365.96 is: 108,140.45
Step by Step Solution
- Step 1: Write the proportion equation
139,625.46 : 192,674.99 = 78,365.96 : x - Step 2: Convert to fraction form
139,625.46/192,674.99 = 78,365.96/x - Step 3: Cross multiply
139,625.46x = 192,674.99 × 78,365.96 - Step 4: Simplify right side
139,625.46x = 15,099,159,785.81 - Step 5: Solve for x
x = 15,099,159,785.81/139,625.46 - Step 6: Final answer
x = 108,140.45
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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.