Finding the Fourth Proportional to 189,679.23, 261,453.32 and 128,406.09
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Solution
The fourth proportional to 189,679.23, 261,453.32 and 128,406.09 is: 176,994.60
Step by Step Solution
- Step 1: Write the proportion equation
189,679.23 : 261,453.32 = 128,406.09 : x - Step 2: Convert to fraction form
189,679.23/261,453.32 = 128,406.09/x - Step 3: Cross multiply
189,679.23x = 261,453.32 × 128,406.09 - Step 4: Simplify right side
189,679.23x = 33,572,198,538.72 - Step 5: Solve for x
x = 33,572,198,538.72/189,679.23 - Step 6: Final answer
x = 176,994.60
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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.