Finding the Fourth Proportional to 86,427.09, 129,638.16 and 47,232.45
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Solution
The fourth proportional to 86,427.09, 129,638.16 and 47,232.45 is: 70,847.32
Step by Step Solution
- Step 1: Write the proportion equation
86,427.09 : 129,638.16 = 47,232.45 : x - Step 2: Convert to fraction form
86,427.09/129,638.16 = 47,232.45/x - Step 3: Cross multiply
86,427.09x = 129,638.16 × 47,232.45 - Step 4: Simplify right side
86,427.09x = 6,123,127,910.29 - Step 5: Solve for x
x = 6,123,127,910.29/86,427.09 - Step 6: Final answer
x = 70,847.32
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.