Finding the Fourth Proportional to 128,179.20, 192,269.27 and 39,432.09
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Solution
The fourth proportional to 128,179.20, 192,269.27 and 39,432.09 is: 59,148.28
Step by Step Solution
- Step 1: Write the proportion equation
128,179.20 : 192,269.27 = 39,432.09 : x - Step 2: Convert to fraction form
128,179.20/192,269.27 = 39,432.09/x - Step 3: Cross multiply
128,179.20x = 192,269.27 × 39,432.09 - Step 4: Simplify right side
128,179.20x = 7,581,579,158.87 - Step 5: Solve for x
x = 7,581,579,158.87/128,179.20 - Step 6: Final answer
x = 59,148.28
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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.