Finding the Fourth Proportional to 139,868.38, 193,015.90 and 76,206.62
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Solution
The fourth proportional to 139,868.38, 193,015.90 and 76,206.62 is: 105,163.79
Step by Step Solution
- Step 1: Write the proportion equation
139,868.38 : 193,015.90 = 76,206.62 : x - Step 2: Convert to fraction form
139,868.38/193,015.90 = 76,206.62/x - Step 3: Cross multiply
139,868.38x = 193,015.90 × 76,206.62 - Step 4: Simplify right side
139,868.38x = 14,709,089,345.26 - Step 5: Solve for x
x = 14,709,089,345.26/139,868.38 - Step 6: Final answer
x = 105,163.79
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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.