Finding the Fourth Proportional to 139,222.36, 192,126.74 and 78,791.91
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Solution
The fourth proportional to 139,222.36, 192,126.74 and 78,791.91 is: 108,732.76
Step by Step Solution
- Step 1: Write the proportion equation
139,222.36 : 192,126.74 = 78,791.91 : x - Step 2: Convert to fraction form
139,222.36/192,126.74 = 78,791.91/x - Step 3: Cross multiply
139,222.36x = 192,126.74 × 78,791.91 - Step 4: Simplify right side
139,222.36x = 15,138,031,692.24 - Step 5: Solve for x
x = 15,138,031,692.24/139,222.36 - Step 6: Final answer
x = 108,732.76
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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.