Finding the Fourth Proportional to 102,820.80, 153,928.80 and 76,641.60
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Solution
The fourth proportional to 102,820.80, 153,928.80 and 76,641.60 is: 114,736.99
Step by Step Solution
- Step 1: Write the proportion equation
102,820.80 : 153,928.80 = 76,641.60 : x - Step 2: Convert to fraction form
102,820.80/153,928.80 = 76,641.60/x - Step 3: Cross multiply
102,820.80x = 153,928.80 × 76,641.60 - Step 4: Simplify right side
102,820.80x = 11,797,349,518.08 - Step 5: Solve for x
x = 11,797,349,518.08/102,820.80 - Step 6: Final answer
x = 114,736.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.