Finding the Fourth Proportional to 138,361.12, 190,924.56 and 77,930.08
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Solution
The fourth proportional to 138,361.12, 190,924.56 and 77,930.08 is: 107,535.75
Step by Step Solution
- Step 1: Write the proportion equation
138,361.12 : 190,924.56 = 77,930.08 : x - Step 2: Convert to fraction form
138,361.12/190,924.56 = 77,930.08/x - Step 3: Cross multiply
138,361.12x = 190,924.56 × 77,930.08 - Step 4: Simplify right side
138,361.12x = 14,878,766,234.76 - Step 5: Solve for x
x = 14,878,766,234.76/138,361.12 - Step 6: Final answer
x = 107,535.75
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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.