Finding the Fourth Proportional to 124,711.20, 186,861.60 and 72,028.80
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Solution
The fourth proportional to 124,711.20, 186,861.60 and 72,028.80 is: 107,924.68
Step by Step Solution
- Step 1: Write the proportion equation
124,711.20 : 186,861.60 = 72,028.80 : x - Step 2: Convert to fraction form
124,711.20/186,861.60 = 72,028.80/x - Step 3: Cross multiply
124,711.20x = 186,861.60 × 72,028.80 - Step 4: Simplify right side
124,711.20x = 13,459,416,814.08 - Step 5: Solve for x
x = 13,459,416,814.08/124,711.20 - Step 6: Final answer
x = 107,924.68
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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.