Finding the Fourth Proportional to 100,543.14, 138,685.77 and 61,763.99
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Solution
The fourth proportional to 100,543.14, 138,685.77 and 61,763.99 is: 85,195.13
Step by Step Solution
- Step 1: Write the proportion equation
100,543.14 : 138,685.77 = 61,763.99 : x - Step 2: Convert to fraction form
100,543.14/138,685.77 = 61,763.99/x - Step 3: Cross multiply
100,543.14x = 138,685.77 × 61,763.99 - Step 4: Simplify right side
100,543.14x = 8,565,785,817.99 - Step 5: Solve for x
x = 8,565,785,817.99/100,543.14 - Step 6: Final answer
x = 85,195.13
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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.