Finding the Fourth Proportional to 100,983.48, 139,350.86 and 55,658.97
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Solution
The fourth proportional to 100,983.48, 139,350.86 and 55,658.97 is: 76,805.88
Step by Step Solution
- Step 1: Write the proportion equation
100,983.48 : 139,350.86 = 55,658.97 : x - Step 2: Convert to fraction form
100,983.48/139,350.86 = 55,658.97/x - Step 3: Cross multiply
100,983.48x = 139,350.86 × 55,658.97 - Step 4: Simplify right side
100,983.48x = 7,756,125,336.21 - Step 5: Solve for x
x = 7,756,125,336.21/100,983.48 - Step 6: Final answer
x = 76,805.88
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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.