Finding the Fourth Proportional to 128,409.24, 177,211.62 and 71,810.76
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Solution
The fourth proportional to 128,409.24, 177,211.62 and 71,810.76 is: 99,102.69
Step by Step Solution
- Step 1: Write the proportion equation
128,409.24 : 177,211.62 = 71,810.76 : x - Step 2: Convert to fraction form
128,409.24/177,211.62 = 71,810.76/x - Step 3: Cross multiply
128,409.24x = 177,211.62 × 71,810.76 - Step 4: Simplify right side
128,409.24x = 12,725,701,113.03 - Step 5: Solve for x
x = 12,725,701,113.03/128,409.24 - Step 6: Final answer
x = 99,102.69
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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.