Finding the Fourth Proportional to 128,040.04, 176,668.26 and 74,318.44
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Solution
The fourth proportional to 128,040.04, 176,668.26 and 74,318.44 is: 102,543.78
Step by Step Solution
- Step 1: Write the proportion equation
128,040.04 : 176,668.26 = 74,318.44 : x - Step 2: Convert to fraction form
128,040.04/176,668.26 = 74,318.44/x - Step 3: Cross multiply
128,040.04x = 176,668.26 × 74,318.44 - Step 4: Simplify right side
128,040.04x = 13,129,709,480.71 - Step 5: Solve for x
x = 13,129,709,480.71/128,040.04 - Step 6: Final answer
x = 102,543.78
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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.