Finding the Fourth Proportional to 128,628.83, 177,532.67 and 74,216.19
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Solution
The fourth proportional to 128,628.83, 177,532.67 and 74,216.19 is: 102,432.70
Step by Step Solution
- Step 1: Write the proportion equation
128,628.83 : 177,532.67 = 74,216.19 : x - Step 2: Convert to fraction form
128,628.83/177,532.67 = 74,216.19/x - Step 3: Cross multiply
128,628.83x = 177,532.67 × 74,216.19 - Step 4: Simplify right side
128,628.83x = 13,175,797,957.89 - Step 5: Solve for x
x = 13,175,797,957.89/128,628.83 - Step 6: Final answer
x = 102,432.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.