Finding the Fourth Proportional to 128,271.20, 177,013.84 and 71,682.56
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Solution
The fourth proportional to 128,271.20, 177,013.84 and 71,682.56 is: 98,921.70
Step by Step Solution
- Step 1: Write the proportion equation
128,271.20 : 177,013.84 = 71,682.56 : x - Step 2: Convert to fraction form
128,271.20/177,013.84 = 71,682.56/x - Step 3: Cross multiply
128,271.20x = 177,013.84 × 71,682.56 - Step 4: Simplify right side
128,271.20x = 12,688,805,206.63 - Step 5: Solve for x
x = 12,688,805,206.63/128,271.20 - Step 6: Final answer
x = 98,921.70
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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.