Finding the Fourth Proportional to 77,652.21, 107,011.80 and 66,893.70
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Solution
The fourth proportional to 77,652.21, 107,011.80 and 66,893.70 is: 92,185.60
Step by Step Solution
- Step 1: Write the proportion equation
77,652.21 : 107,011.80 = 66,893.70 : x - Step 2: Convert to fraction form
77,652.21/107,011.80 = 66,893.70/x - Step 3: Cross multiply
77,652.21x = 107,011.80 × 66,893.70 - Step 4: Simplify right side
77,652.21x = 7,158,415,245.66 - Step 5: Solve for x
x = 7,158,415,245.66/77,652.21 - Step 6: Final answer
x = 92,185.60
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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.