Finding the Fourth Proportional to 79,430.09, 109,638.09 and 51,135.75
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Solution
The fourth proportional to 79,430.09, 109,638.09 and 51,135.75 is: 70,583.15
Step by Step Solution
- Step 1: Write the proportion equation
79,430.09 : 109,638.09 = 51,135.75 : x - Step 2: Convert to fraction form
79,430.09/109,638.09 = 51,135.75/x - Step 3: Cross multiply
79,430.09x = 109,638.09 × 51,135.75 - Step 4: Simplify right side
79,430.09x = 5,606,425,960.72 - Step 5: Solve for x
x = 5,606,425,960.72/79,430.09 - Step 6: Final answer
x = 70,583.15
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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.