Finding the Fourth Proportional to 100,615.79, 138,843.07 and 55,292.79
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Solution
The fourth proportional to 100,615.79, 138,843.07 and 55,292.79 is: 76,300.37
Step by Step Solution
- Step 1: Write the proportion equation
100,615.79 : 138,843.07 = 55,292.79 : x - Step 2: Convert to fraction form
100,615.79/138,843.07 = 55,292.79/x - Step 3: Cross multiply
100,615.79x = 138,843.07 × 55,292.79 - Step 4: Simplify right side
100,615.79x = 7,677,021,302.24 - Step 5: Solve for x
x = 7,677,021,302.24/100,615.79 - Step 6: Final answer
x = 76,300.37
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1.5x scale
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.