Finding the Fourth Proportional to 118,932.98, 164,135.09 and 78,575.94
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Solution
The fourth proportional to 118,932.98, 164,135.09 and 78,575.94 is: 108,439.81
Step by Step Solution
- Step 1: Write the proportion equation
118,932.98 : 164,135.09 = 78,575.94 : x - Step 2: Convert to fraction form
118,932.98/164,135.09 = 78,575.94/x - Step 3: Cross multiply
118,932.98x = 164,135.09 × 78,575.94 - Step 4: Simplify right side
118,932.98x = 12,897,069,180.17 - Step 5: Solve for x
x = 12,897,069,180.17/118,932.98 - Step 6: Final answer
x = 108,439.81
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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.