Finding the Fourth Proportional to 76,690.47, 105,816.58 and 48,379.75
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Solution
The fourth proportional to 76,690.47, 105,816.58 and 48,379.75 is: 66,753.79
Step by Step Solution
- Step 1: Write the proportion equation
76,690.47 : 105,816.58 = 48,379.75 : x - Step 2: Convert to fraction form
76,690.47/105,816.58 = 48,379.75/x - Step 3: Cross multiply
76,690.47x = 105,816.58 × 48,379.75 - Step 4: Simplify right side
76,690.47x = 5,119,379,686.26 - Step 5: Solve for x
x = 5,119,379,686.26/76,690.47 - Step 6: Final answer
x = 66,753.79
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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.