Finding the Fourth Proportional to 100,331.10, 138,456.54 and 55,011.02
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Solution
The fourth proportional to 100,331.10, 138,456.54 and 55,011.02 is: 75,914.99
Step by Step Solution
- Step 1: Write the proportion equation
100,331.10 : 138,456.54 = 55,011.02 : x - Step 2: Convert to fraction form
100,331.10/138,456.54 = 55,011.02/x - Step 3: Cross multiply
100,331.10x = 138,456.54 × 55,011.02 - Step 4: Simplify right side
100,331.10x = 7,616,634,798.79 - Step 5: Solve for x
x = 7,616,634,798.79/100,331.10 - Step 6: Final answer
x = 75,914.99
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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.