Finding the Fourth Proportional to 77,699.12, 107,630.88 and 76,124.48
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Solution
The fourth proportional to 77,699.12, 107,630.88 and 76,124.48 is: 105,449.65
Step by Step Solution
- Step 1: Write the proportion equation
77,699.12 : 107,630.88 = 76,124.48 : x - Step 2: Convert to fraction form
77,699.12/107,630.88 = 76,124.48/x - Step 3: Cross multiply
77,699.12x = 107,630.88 × 76,124.48 - Step 4: Simplify right side
77,699.12x = 8,193,344,771.94 - Step 5: Solve for x
x = 8,193,344,771.94/77,699.12 - Step 6: Final answer
x = 105,449.65
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.