Finding the Fourth Proportional to 129,652.88, 178,970.18 and 87,236.01
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Solution
The fourth proportional to 129,652.88, 178,970.18 and 87,236.01 is: 120,418.80
Step by Step Solution
- Step 1: Write the proportion equation
129,652.88 : 178,970.18 = 87,236.01 : x - Step 2: Convert to fraction form
129,652.88/178,970.18 = 87,236.01/x - Step 3: Cross multiply
129,652.88x = 178,970.18 × 87,236.01 - Step 4: Simplify right side
129,652.88x = 15,612,643,976.00 - Step 5: Solve for x
x = 15,612,643,976.00/129,652.88 - Step 6: Final answer
x = 120,418.80
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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.