Finding the Fourth Proportional to 87,619.95, 120,660.84 and 76,129.56
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Solution
The fourth proportional to 87,619.95, 120,660.84 and 76,129.56 is: 104,837.50
Step by Step Solution
- Step 1: Write the proportion equation
87,619.95 : 120,660.84 = 76,129.56 : x - Step 2: Convert to fraction form
87,619.95/120,660.84 = 76,129.56/x - Step 3: Cross multiply
87,619.95x = 120,660.84 × 76,129.56 - Step 4: Simplify right side
87,619.95x = 9,185,856,658.43 - Step 5: Solve for x
x = 9,185,856,658.43/87,619.95 - Step 6: Final answer
x = 104,837.50
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1.5x scale
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.