Finding the Fourth Proportional to 128,083.12, 192,119.64 and 39,332.08
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Solution
The fourth proportional to 128,083.12, 192,119.64 and 39,332.08 is: 58,996.57
Step by Step Solution
- Step 1: Write the proportion equation
128,083.12 : 192,119.64 = 39,332.08 : x - Step 2: Convert to fraction form
128,083.12/192,119.64 = 39,332.08/x - Step 3: Cross multiply
128,083.12x = 192,119.64 × 39,332.08 - Step 4: Simplify right side
128,083.12x = 7,556,465,050.05 - Step 5: Solve for x
x = 7,556,465,050.05/128,083.12 - Step 6: Final answer
x = 58,996.57
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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.