Finding the Fourth Proportional to 107,857.80, 161,786.70 and 61,201.80
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Solution
The fourth proportional to 107,857.80, 161,786.70 and 61,201.80 is: 91,802.70
Step by Step Solution
- Step 1: Write the proportion equation
107,857.80 : 161,786.70 = 61,201.80 : x - Step 2: Convert to fraction form
107,857.80/161,786.70 = 61,201.80/x - Step 3: Cross multiply
107,857.80x = 161,786.70 × 61,201.80 - Step 4: Simplify right side
107,857.80x = 9,901,637,256.06 - Step 5: Solve for x
x = 9,901,637,256.06/107,857.80 - Step 6: Final answer
x = 91,802.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.