Finding the Fourth Proportional to 138,109.34, 190,596.58 and 77,682.80
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Solution
The fourth proportional to 138,109.34, 190,596.58 and 77,682.80 is: 107,205.46
Step by Step Solution
- Step 1: Write the proportion equation
138,109.34 : 190,596.58 = 77,682.80 : x - Step 2: Convert to fraction form
138,109.34/190,596.58 = 77,682.80/x - Step 3: Cross multiply
138,109.34x = 190,596.58 × 77,682.80 - Step 4: Simplify right side
138,109.34x = 14,806,076,004.82 - Step 5: Solve for x
x = 14,806,076,004.82/138,109.34 - Step 6: Final answer
x = 107,205.46
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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.