Finding the Fourth Proportional to 108,658.13, 149,915.21 and 68,412.06
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Solution
The fourth proportional to 108,658.13, 149,915.21 and 68,412.06 is: 94,387.86
Step by Step Solution
- Step 1: Write the proportion equation
108,658.13 : 149,915.21 = 68,412.06 : x - Step 2: Convert to fraction form
108,658.13/149,915.21 = 68,412.06/x - Step 3: Cross multiply
108,658.13x = 149,915.21 × 68,412.06 - Step 4: Simplify right side
108,658.13x = 10,256,007,999.37 - Step 5: Solve for x
x = 10,256,007,999.37/108,658.13 - Step 6: Final answer
x = 94,387.86
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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.