Finding the Fourth Proportional to 128,660.06, 177,550.92 and 72,072.65
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Solution
The fourth proportional to 128,660.06, 177,550.92 and 72,072.65 is: 99,460.28
Step by Step Solution
- Step 1: Write the proportion equation
128,660.06 : 177,550.92 = 72,072.65 : x - Step 2: Convert to fraction form
128,660.06/177,550.92 = 72,072.65/x - Step 3: Cross multiply
128,660.06x = 177,550.92 × 72,072.65 - Step 4: Simplify right side
128,660.06x = 12,796,565,758.22 - Step 5: Solve for x
x = 12,796,565,758.22/128,660.06 - Step 6: Final answer
x = 99,460.28
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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.