Finding the Fourth Proportional to 100,998.18, 139,378.46 and 55,677.79
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Solution
The fourth proportional to 100,998.18, 139,378.46 and 55,677.79 is: 76,835.89
Step by Step Solution
- Step 1: Write the proportion equation
100,998.18 : 139,378.46 = 55,677.79 : x - Step 2: Convert to fraction form
100,998.18/139,378.46 = 55,677.79/x - Step 3: Cross multiply
100,998.18x = 139,378.46 × 55,677.79 - Step 4: Simplify right side
100,998.18x = 7,760,284,953.13 - Step 5: Solve for x
x = 7,760,284,953.13/100,998.18 - Step 6: Final answer
x = 76,835.89
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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.