Finding the Fourth Proportional to 81,163.20, 121,744.80 and 53,169.60
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Solution
The fourth proportional to 81,163.20, 121,744.80 and 53,169.60 is: 79,754.40
Step by Step Solution
- Step 1: Write the proportion equation
81,163.20 : 121,744.80 = 53,169.60 : x - Step 2: Convert to fraction form
81,163.20/121,744.80 = 53,169.60/x - Step 3: Cross multiply
81,163.20x = 121,744.80 × 53,169.60 - Step 4: Simplify right side
81,163.20x = 6,473,122,318.08 - Step 5: Solve for x
x = 6,473,122,318.08/81,163.20 - Step 6: Final answer
x = 79,754.40
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1.5x scale
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.