Finding the Fourth Proportional to 128,670.14, 177,559.68 and 71,311.88
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Solution
The fourth proportional to 128,670.14, 177,559.68 and 71,311.88 is: 98,407.56
Step by Step Solution
- Step 1: Write the proportion equation
128,670.14 : 177,559.68 = 71,311.88 : x - Step 2: Convert to fraction form
128,670.14/177,559.68 = 71,311.88/x - Step 3: Cross multiply
128,670.14x = 177,559.68 × 71,311.88 - Step 4: Simplify right side
128,670.14x = 12,662,113,705.20 - Step 5: Solve for x
x = 12,662,113,705.20/128,670.14 - Step 6: Final answer
x = 98,407.56
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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.