Finding the Fourth Proportional to 121,857.74, 167,789.84 and 106,665.38
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Solution
The fourth proportional to 121,857.74, 167,789.84 and 106,665.38 is: 146,870.99
Step by Step Solution
- Step 1: Write the proportion equation
121,857.74 : 167,789.84 = 106,665.38 : x - Step 2: Convert to fraction form
121,857.74/167,789.84 = 106,665.38/x - Step 3: Cross multiply
121,857.74x = 167,789.84 × 106,665.38 - Step 4: Simplify right side
121,857.74x = 17,897,367,043.74 - Step 5: Solve for x
x = 17,897,367,043.74/121,857.74 - Step 6: Final answer
x = 146,870.99
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1.5x scale
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.