Finding the Fourth Proportional to 86,739.71, 119,634.74 and 74,660.73
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Solution
The fourth proportional to 86,739.71, 119,634.74 and 74,660.73 is: 102,974.95
Step by Step Solution
- Step 1: Write the proportion equation
86,739.71 : 119,634.74 = 74,660.73 : x - Step 2: Convert to fraction form
86,739.71/119,634.74 = 74,660.73/x - Step 3: Cross multiply
86,739.71x = 119,634.74 × 74,660.73 - Step 4: Simplify right side
86,739.71x = 8,932,016,648.46 - Step 5: Solve for x
x = 8,932,016,648.46/86,739.71 - Step 6: Final answer
x = 102,974.95
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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.