Finding the Fourth Proportional to 139,885.28, 193,036.20 and 76,221.44
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Solution
The fourth proportional to 139,885.28, 193,036.20 and 76,221.44 is: 105,182.60
Step by Step Solution
- Step 1: Write the proportion equation
139,885.28 : 193,036.20 = 76,221.44 : x - Step 2: Convert to fraction form
139,885.28/193,036.20 = 76,221.44/x - Step 3: Cross multiply
139,885.28x = 193,036.20 × 76,221.44 - Step 4: Simplify right side
139,885.28x = 14,713,497,136.13 - Step 5: Solve for x
x = 14,713,497,136.13/139,885.28 - Step 6: Final answer
x = 105,182.60
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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.