Finding the Fourth Proportional to 128,581.60, 192,842.70 and 48,628.12
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Solution
The fourth proportional to 128,581.60, 192,842.70 and 48,628.12 is: 72,930.95
Step by Step Solution
- Step 1: Write the proportion equation
128,581.60 : 192,842.70 = 48,628.12 : x - Step 2: Convert to fraction form
128,581.60/192,842.70 = 48,628.12/x - Step 3: Cross multiply
128,581.60x = 192,842.70 × 48,628.12 - Step 4: Simplify right side
128,581.60x = 9,377,577,956.72 - Step 5: Solve for x
x = 9,377,577,956.72/128,581.60 - Step 6: Final answer
x = 72,930.95
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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.