Finding the Fourth Proportional to 129,427.18, 178,664.62 and 87,010.31
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Solution
The fourth proportional to 129,427.18, 178,664.62 and 87,010.31 is: 120,111.28
Step by Step Solution
- Step 1: Write the proportion equation
129,427.18 : 178,664.62 = 87,010.31 : x - Step 2: Convert to fraction form
129,427.18/178,664.62 = 87,010.31/x - Step 3: Cross multiply
129,427.18x = 178,664.62 × 87,010.31 - Step 4: Simplify right side
129,427.18x = 15,545,663,972.23 - Step 5: Solve for x
x = 15,545,663,972.23/129,427.18 - Step 6: Final answer
x = 120,111.28
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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.