Finding the Fourth Proportional to 139,888.44, 193,039.99 and 79,458.90
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Solution
The fourth proportional to 139,888.44, 193,039.99 and 79,458.90 is: 109,649.84
Step by Step Solution
- Step 1: Write the proportion equation
139,888.44 : 193,039.99 = 79,458.90 : x - Step 2: Convert to fraction form
139,888.44/193,039.99 = 79,458.90/x - Step 3: Cross multiply
139,888.44x = 193,039.99 × 79,458.90 - Step 4: Simplify right side
139,888.44x = 15,338,745,261.41 - Step 5: Solve for x
x = 15,338,745,261.41/139,888.44 - Step 6: Final answer
x = 109,649.84
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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.