Finding the Fourth Proportional to 128,534.68, 177,379.68 and 74,056.75
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Solution
The fourth proportional to 128,534.68, 177,379.68 and 74,056.75 is: 102,199.35
Step by Step Solution
- Step 1: Write the proportion equation
128,534.68 : 177,379.68 = 74,056.75 : x - Step 2: Convert to fraction form
128,534.68/177,379.68 = 74,056.75/x - Step 3: Cross multiply
128,534.68x = 177,379.68 × 74,056.75 - Step 4: Simplify right side
128,534.68x = 13,136,161,359.66 - Step 5: Solve for x
x = 13,136,161,359.66/128,534.68 - Step 6: Final answer
x = 102,199.35
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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.