Finding the Fourth Proportional to 111,893.12, 167,839.68 and 76,726.08
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Solution
The fourth proportional to 111,893.12, 167,839.68 and 76,726.08 is: 115,089.12
Step by Step Solution
- Step 1: Write the proportion equation
111,893.12 : 167,839.68 = 76,726.08 : x - Step 2: Convert to fraction form
111,893.12/167,839.68 = 76,726.08/x - Step 3: Cross multiply
111,893.12x = 167,839.68 × 76,726.08 - Step 4: Simplify right side
111,893.12x = 12,877,680,714.85 - Step 5: Solve for x
x = 12,877,680,714.85/111,893.12 - Step 6: Final answer
x = 115,089.12
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.