Finding the Fourth Proportional to 100,589.18, 138,813.10 and 55,270.06
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Solution
The fourth proportional to 100,589.18, 138,813.10 and 55,270.06 is: 76,272.70
Step by Step Solution
- Step 1: Write the proportion equation
100,589.18 : 138,813.10 = 55,270.06 : x - Step 2: Convert to fraction form
100,589.18/138,813.10 = 55,270.06/x - Step 3: Cross multiply
100,589.18x = 138,813.10 × 55,270.06 - Step 4: Simplify right side
100,589.18x = 7,672,208,365.79 - Step 5: Solve for x
x = 7,672,208,365.79/100,589.18 - Step 6: Final answer
x = 76,272.70
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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.