Finding the Fourth Proportional to 77,653.21, 107,013.18 and 66,894.70
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Solution
The fourth proportional to 77,653.21, 107,013.18 and 66,894.70 is: 92,186.98
Step by Step Solution
- Step 1: Write the proportion equation
77,653.21 : 107,013.18 = 66,894.70 : x - Step 2: Convert to fraction form
77,653.21/107,013.18 = 66,894.70/x - Step 3: Cross multiply
77,653.21x = 107,013.18 × 66,894.70 - Step 4: Simplify right side
77,653.21x = 7,158,614,572.15 - Step 5: Solve for x
x = 7,158,614,572.15/77,653.21 - Step 6: Final answer
x = 92,186.98
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1.5x scale
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.