Finding the Fourth Proportional to 189,680.23, 261,454.70 and 128,407.09
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Solution
The fourth proportional to 189,680.23, 261,454.70 and 128,407.09 is: 176,995.97
Step by Step Solution
- Step 1: Write the proportion equation
189,680.23 : 261,454.70 = 128,407.09 : x - Step 2: Convert to fraction form
189,680.23/261,454.70 = 128,407.09/x - Step 3: Cross multiply
189,680.23x = 261,454.70 × 128,407.09 - Step 4: Simplify right side
189,680.23x = 33,572,637,193.82 - Step 5: Solve for x
x = 33,572,637,193.82/189,680.23 - Step 6: Final answer
x = 176,995.97
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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.