Finding the Fourth Proportional to 128,824.08, 177,778.68 and 71,464.56
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Solution
The fourth proportional to 128,824.08, 177,778.68 and 71,464.56 is: 98,621.90
Step by Step Solution
- Step 1: Write the proportion equation
128,824.08 : 177,778.68 = 71,464.56 : x - Step 2: Convert to fraction form
128,824.08/177,778.68 = 71,464.56/x - Step 3: Cross multiply
128,824.08x = 177,778.68 × 71,464.56 - Step 4: Simplify right side
128,824.08x = 12,704,875,143.58 - Step 5: Solve for x
x = 12,704,875,143.58/128,824.08 - Step 6: Final answer
x = 98,621.90
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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.