Finding the Fourth Proportional to 74,013.75, 102,139.38 and 40,479.75
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Solution
The fourth proportional to 74,013.75, 102,139.38 and 40,479.75 is: 55,862.28
Step by Step Solution
- Step 1: Write the proportion equation
74,013.75 : 102,139.38 = 40,479.75 : x - Step 2: Convert to fraction form
74,013.75/102,139.38 = 40,479.75/x - Step 3: Cross multiply
74,013.75x = 102,139.38 × 40,479.75 - Step 4: Simplify right side
74,013.75x = 4,134,576,567.56 - Step 5: Solve for x
x = 4,134,576,567.56/74,013.75 - Step 6: Final answer
x = 55,862.28
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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.