Finding the Fourth Proportional to 135,521.96, 187,015.22 and 78,163.68
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Solution
The fourth proportional to 135,521.96, 187,015.22 and 78,163.68 is: 107,862.95
Step by Step Solution
- Step 1: Write the proportion equation
135,521.96 : 187,015.22 = 78,163.68 : x - Step 2: Convert to fraction form
135,521.96/187,015.22 = 78,163.68/x - Step 3: Cross multiply
135,521.96x = 187,015.22 × 78,163.68 - Step 4: Simplify right side
135,521.96x = 14,617,797,811.21 - Step 5: Solve for x
x = 14,617,797,811.21/135,521.96 - Step 6: Final answer
x = 107,862.95
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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.