Finding the Fourth Proportional to 128,493.14, 177,238.26 and 103,060.53
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Solution
The fourth proportional to 128,493.14, 177,238.26 and 103,060.53 is: 142,157.55
Step by Step Solution
- Step 1: Write the proportion equation
128,493.14 : 177,238.26 = 103,060.53 : x - Step 2: Convert to fraction form
128,493.14/177,238.26 = 103,060.53/x - Step 3: Cross multiply
128,493.14x = 177,238.26 × 103,060.53 - Step 4: Simplify right side
128,493.14x = 18,266,269,011.88 - Step 5: Solve for x
x = 18,266,269,011.88/128,493.14 - Step 6: Final answer
x = 142,157.55
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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.