Finding the Fourth Proportional to 140,121.49, 193,371.93 and 79,700.84
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Solution
The fourth proportional to 140,121.49, 193,371.93 and 79,700.84 is: 109,989.59
Step by Step Solution
- Step 1: Write the proportion equation
140,121.49 : 193,371.93 = 79,700.84 : x - Step 2: Convert to fraction form
140,121.49/193,371.93 = 79,700.84/x - Step 3: Cross multiply
140,121.49x = 193,371.93 × 79,700.84 - Step 4: Simplify right side
140,121.49x = 15,411,905,936.10 - Step 5: Solve for x
x = 15,411,905,936.10/140,121.49 - Step 6: Final answer
x = 109,989.59
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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.