Finding the Fourth Proportional to 138,919.65, 208,299.02 and 122,313.03
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Solution
The fourth proportional to 138,919.65, 208,299.02 and 122,313.03 is: 183,398.70
Step by Step Solution
- Step 1: Write the proportion equation
138,919.65 : 208,299.02 = 122,313.03 : x - Step 2: Convert to fraction form
138,919.65/208,299.02 = 122,313.03/x - Step 3: Cross multiply
138,919.65x = 208,299.02 × 122,313.03 - Step 4: Simplify right side
138,919.65x = 25,477,683,670.67 - Step 5: Solve for x
x = 25,477,683,670.67/138,919.65 - Step 6: Final answer
x = 183,398.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.