Finding the Fourth Proportional to 74,568.80, 102,919.68 and 42,759.20
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Solution
The fourth proportional to 74,568.80, 102,919.68 and 42,759.20 is: 59,016.15
Step by Step Solution
- Step 1: Write the proportion equation
74,568.80 : 102,919.68 = 42,759.20 : x - Step 2: Convert to fraction form
74,568.80/102,919.68 = 42,759.20/x - Step 3: Cross multiply
74,568.80x = 102,919.68 × 42,759.20 - Step 4: Simplify right side
74,568.80x = 4,400,763,181.06 - Step 5: Solve for x
x = 4,400,763,181.06/74,568.80 - Step 6: Final answer
x = 59,016.15
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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.