Finding the Fourth Proportional to 122,315.27, 168,638.85 and 79,218.63
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Solution
The fourth proportional to 122,315.27, 168,638.85 and 79,218.63 is: 109,220.53
Step by Step Solution
- Step 1: Write the proportion equation
122,315.27 : 168,638.85 = 79,218.63 : x - Step 2: Convert to fraction form
122,315.27/168,638.85 = 79,218.63/x - Step 3: Cross multiply
122,315.27x = 168,638.85 × 79,218.63 - Step 4: Simplify right side
122,315.27x = 13,359,338,661.78 - Step 5: Solve for x
x = 13,359,338,661.78/122,315.27 - Step 6: Final answer
x = 109,220.53
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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.