Finding the Fourth Proportional to 138,393.24, 190,949.68 and 77,951.80
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Solution
The fourth proportional to 138,393.24, 190,949.68 and 77,951.80 is: 107,554.90
Step by Step Solution
- Step 1: Write the proportion equation
138,393.24 : 190,949.68 = 77,951.80 : x - Step 2: Convert to fraction form
138,393.24/190,949.68 = 77,951.80/x - Step 3: Cross multiply
138,393.24x = 190,949.68 × 77,951.80 - Step 4: Simplify right side
138,393.24x = 14,884,871,265.42 - Step 5: Solve for x
x = 14,884,871,265.42/138,393.24 - Step 6: Final answer
x = 107,554.90
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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.