Finding the Fourth Proportional to 128,538.80, 192,854.42 and 57,455.53
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Solution
The fourth proportional to 128,538.80, 192,854.42 and 57,455.53 is: 86,203.95
Step by Step Solution
- Step 1: Write the proportion equation
128,538.80 : 192,854.42 = 57,455.53 : x - Step 2: Convert to fraction form
128,538.80/192,854.42 = 57,455.53/x - Step 3: Cross multiply
128,538.80x = 192,854.42 × 57,455.53 - Step 4: Simplify right side
128,538.80x = 11,080,552,359.99 - Step 5: Solve for x
x = 11,080,552,359.99/128,538.80 - Step 6: Final answer
x = 86,203.95
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.