Finding the Fourth Proportional to 128,028.30, 176,650.79 and 74,282.19
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Solution
The fourth proportional to 128,028.30, 176,650.79 and 74,282.19 is: 102,493.02
Step by Step Solution
- Step 1: Write the proportion equation
128,028.30 : 176,650.79 = 74,282.19 : x - Step 2: Convert to fraction form
128,028.30/176,650.79 = 74,282.19/x - Step 3: Cross multiply
128,028.30x = 176,650.79 × 74,282.19 - Step 4: Simplify right side
128,028.30x = 13,122,007,175.02 - Step 5: Solve for x
x = 13,122,007,175.02/128,028.30 - Step 6: Final answer
x = 102,493.02
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1.5x scale
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.