Finding the Fourth Proportional to 129,353.53, 178,507.92 and 72,764.95
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Solution
The fourth proportional to 129,353.53, 178,507.92 and 72,764.95 is: 100,415.66
Step by Step Solution
- Step 1: Write the proportion equation
129,353.53 : 178,507.92 = 72,764.95 : x - Step 2: Convert to fraction form
129,353.53/178,507.92 = 72,764.95/x - Step 3: Cross multiply
129,353.53x = 178,507.92 × 72,764.95 - Step 4: Simplify right side
129,353.53x = 12,989,119,873.40 - Step 5: Solve for x
x = 12,989,119,873.40/129,353.53 - Step 6: Final answer
x = 100,415.66
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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.