Finding the Fourth Proportional to 138,195.44, 190,705.56 and 77,769.44
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Solution
The fourth proportional to 138,195.44, 190,705.56 and 77,769.44 is: 107,319.49
Step by Step Solution
- Step 1: Write the proportion equation
138,195.44 : 190,705.56 = 77,769.44 : x - Step 2: Convert to fraction form
138,195.44/190,705.56 = 77,769.44/x - Step 3: Cross multiply
138,195.44x = 190,705.56 × 77,769.44 - Step 4: Simplify right side
138,195.44x = 14,831,064,606.09 - Step 5: Solve for x
x = 14,831,064,606.09/138,195.44 - Step 6: Final answer
x = 107,319.49
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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.