Finding the Fourth Proportional to 100,478.27, 138,652.39 and 55,149.05
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Solution
The fourth proportional to 100,478.27, 138,652.39 and 55,149.05 is: 76,101.50
Step by Step Solution
- Step 1: Write the proportion equation
100,478.27 : 138,652.39 = 55,149.05 : x - Step 2: Convert to fraction form
100,478.27/138,652.39 = 55,149.05/x - Step 3: Cross multiply
100,478.27x = 138,652.39 × 55,149.05 - Step 4: Simplify right side
100,478.27x = 7,646,546,895.47 - Step 5: Solve for x
x = 7,646,546,895.47/100,478.27 - Step 6: Final answer
x = 76,101.50
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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.