Finding the Fourth Proportional to 128,599.10, 177,462.74 and 71,236.12
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Solution
The fourth proportional to 128,599.10, 177,462.74 and 71,236.12 is: 98,303.62
Step by Step Solution
- Step 1: Write the proportion equation
128,599.10 : 177,462.74 = 71,236.12 : x - Step 2: Convert to fraction form
128,599.10/177,462.74 = 71,236.12/x - Step 3: Cross multiply
128,599.10x = 177,462.74 × 71,236.12 - Step 4: Simplify right side
128,599.10x = 12,641,757,042.17 - Step 5: Solve for x
x = 12,641,757,042.17/128,599.10 - Step 6: Final answer
x = 98,303.62
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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.