Finding the Fourth Proportional to 128,575.68, 177,432.49 and 71,989.08
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Solution
The fourth proportional to 128,575.68, 177,432.49 and 71,989.08 is: 99,343.84
Step by Step Solution
- Step 1: Write the proportion equation
128,575.68 : 177,432.49 = 71,989.08 : x - Step 2: Convert to fraction form
128,575.68/177,432.49 = 71,989.08/x - Step 3: Cross multiply
128,575.68x = 177,432.49 × 71,989.08 - Step 4: Simplify right side
128,575.68x = 12,773,201,717.21 - Step 5: Solve for x
x = 12,773,201,717.21/128,575.68 - Step 6: Final answer
x = 99,343.84
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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.