Finding the Fourth Proportional to 78,564.12, 108,432.54 and 50,268.84
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Solution
The fourth proportional to 78,564.12, 108,432.54 and 50,268.84 is: 69,379.99
Step by Step Solution
- Step 1: Write the proportion equation
78,564.12 : 108,432.54 = 50,268.84 : x - Step 2: Convert to fraction form
78,564.12/108,432.54 = 50,268.84/x - Step 3: Cross multiply
78,564.12x = 108,432.54 × 50,268.84 - Step 4: Simplify right side
78,564.12x = 5,450,778,004.05 - Step 5: Solve for x
x = 5,450,778,004.05/78,564.12 - Step 6: Final answer
x = 69,379.99
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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.