Finding the Fourth Proportional to 129,564.36, 178,796.39 and 72,202.42
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Solution
The fourth proportional to 129,564.36, 178,796.39 and 72,202.42 is: 99,637.99
Step by Step Solution
- Step 1: Write the proportion equation
129,564.36 : 178,796.39 = 72,202.42 : x - Step 2: Convert to fraction form
129,564.36/178,796.39 = 72,202.42/x - Step 3: Cross multiply
129,564.36x = 178,796.39 × 72,202.42 - Step 4: Simplify right side
129,564.36x = 12,909,532,110.82 - Step 5: Solve for x
x = 12,909,532,110.82/129,564.36 - Step 6: Final answer
x = 99,637.99
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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.