Finding the Fourth Proportional to 128,540.84, 177,390.42 and 74,844.68
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Solution
The fourth proportional to 128,540.84, 177,390.42 and 74,844.68 is: 103,288.02
Step by Step Solution
- Step 1: Write the proportion equation
128,540.84 : 177,390.42 = 74,844.68 : x - Step 2: Convert to fraction form
128,540.84/177,390.42 = 74,844.68/x - Step 3: Cross multiply
128,540.84x = 177,390.42 × 74,844.68 - Step 4: Simplify right side
128,540.84x = 13,276,729,219.97 - Step 5: Solve for x
x = 13,276,729,219.97/128,540.84 - Step 6: Final answer
x = 103,288.02
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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.