Finding the Fourth Proportional to 128,781.35, 177,722.88 and 75,057.70
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Solution
The fourth proportional to 128,781.35, 177,722.88 and 75,057.70 is: 103,582.32
Step by Step Solution
- Step 1: Write the proportion equation
128,781.35 : 177,722.88 = 75,057.70 : x - Step 2: Convert to fraction form
128,781.35/177,722.88 = 75,057.70/x - Step 3: Cross multiply
128,781.35x = 177,722.88 × 75,057.70 - Step 4: Simplify right side
128,781.35x = 13,339,470,610.18 - Step 5: Solve for x
x = 13,339,470,610.18/128,781.35 - Step 6: Final answer
x = 103,582.32
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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.