Finding the Fourth Proportional to 81,153.23, 121,713.35 and 67,965.62
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Solution
The fourth proportional to 81,153.23, 121,713.35 and 67,965.62 is: 101,934.61
Step by Step Solution
- Step 1: Write the proportion equation
81,153.23 : 121,713.35 = 67,965.62 : x - Step 2: Convert to fraction form
81,153.23/121,713.35 = 67,965.62/x - Step 3: Cross multiply
81,153.23x = 121,713.35 × 67,965.62 - Step 4: Simplify right side
81,153.23x = 8,272,322,346.63 - Step 5: Solve for x
x = 8,272,322,346.63/81,153.23 - Step 6: Final answer
x = 101,934.61
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1.5x scale
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.