Finding the Fourth Proportional to 77,489.12, 106,936.80 and 43,955.12
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Solution
The fourth proportional to 77,489.12, 106,936.80 and 43,955.12 is: 60,659.09
Step by Step Solution
- Step 1: Write the proportion equation
77,489.12 : 106,936.80 = 43,955.12 : x - Step 2: Convert to fraction form
77,489.12/106,936.80 = 43,955.12/x - Step 3: Cross multiply
77,489.12x = 106,936.80 × 43,955.12 - Step 4: Simplify right side
77,489.12x = 4,700,419,876.42 - Step 5: Solve for x
x = 4,700,419,876.42/77,489.12 - Step 6: Final answer
x = 60,659.09
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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.