Finding the Fourth Proportional to 76,478.60, 105,497.70 and 48,135.08
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Solution
The fourth proportional to 76,478.60, 105,497.70 and 48,135.08 is: 66,399.49
Step by Step Solution
- Step 1: Write the proportion equation
76,478.60 : 105,497.70 = 48,135.08 : x - Step 2: Convert to fraction form
76,478.60/105,497.70 = 48,135.08/x - Step 3: Cross multiply
76,478.60x = 105,497.70 × 48,135.08 - Step 4: Simplify right side
76,478.60x = 5,078,140,229.32 - Step 5: Solve for x
x = 5,078,140,229.32/76,478.60 - Step 6: Final answer
x = 66,399.49
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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.