Finding the Fourth Proportional to 128,455.41, 177,268.77 and 71,098.65
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Solution
The fourth proportional to 128,455.41, 177,268.77 and 71,098.65 is: 98,116.31
Step by Step Solution
- Step 1: Write the proportion equation
128,455.41 : 177,268.77 = 71,098.65 : x - Step 2: Convert to fraction form
128,455.41/177,268.77 = 71,098.65/x - Step 3: Cross multiply
128,455.41x = 177,268.77 × 71,098.65 - Step 4: Simplify right side
128,455.41x = 12,603,570,234.16 - Step 5: Solve for x
x = 12,603,570,234.16/128,455.41 - Step 6: Final answer
x = 98,116.31
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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.