Finding the Fourth Proportional to 128,539.84, 177,389.04 and 74,843.68
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Solution
The fourth proportional to 128,539.84, 177,389.04 and 74,843.68 is: 103,286.64
Step by Step Solution
- Step 1: Write the proportion equation
128,539.84 : 177,389.04 = 74,843.68 : x - Step 2: Convert to fraction form
128,539.84/177,389.04 = 74,843.68/x - Step 3: Cross multiply
128,539.84x = 177,389.04 × 74,843.68 - Step 4: Simplify right side
128,539.84x = 13,276,448,545.27 - Step 5: Solve for x
x = 13,276,448,545.27/128,539.84 - Step 6: Final answer
x = 103,286.64
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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.