Finding the Fourth Proportional to 128,769.75, 193,089.02 and 53,869.59
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Solution
The fourth proportional to 128,769.75, 193,089.02 and 53,869.59 is: 80,776.94
Step by Step Solution
- Step 1: Write the proportion equation
128,769.75 : 193,089.02 = 53,869.59 : x - Step 2: Convert to fraction form
128,769.75/193,089.02 = 53,869.59/x - Step 3: Cross multiply
128,769.75x = 193,089.02 × 53,869.59 - Step 4: Simplify right side
128,769.75x = 10,401,626,071.55 - Step 5: Solve for x
x = 10,401,626,071.55/128,769.75 - Step 6: Final answer
x = 80,776.94
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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.