Finding the Fourth Proportional to 128,634.58, 177,537.69 and 74,951.41
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Solution
The fourth proportional to 128,634.58, 177,537.69 and 74,951.41 is: 103,445.75
Step by Step Solution
- Step 1: Write the proportion equation
128,634.58 : 177,537.69 = 74,951.41 : x - Step 2: Convert to fraction form
128,634.58/177,537.69 = 74,951.41/x - Step 3: Cross multiply
128,634.58x = 177,537.69 × 74,951.41 - Step 4: Simplify right side
128,634.58x = 13,306,700,193.64 - Step 5: Solve for x
x = 13,306,700,193.64/128,634.58 - Step 6: Final answer
x = 103,445.75
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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.