Finding the Fourth Proportional to 139,987.53, 193,177.98 and 79,557.12
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Solution
The fourth proportional to 139,987.53, 193,177.98 and 79,557.12 is: 109,786.09
Step by Step Solution
- Step 1: Write the proportion equation
139,987.53 : 193,177.98 = 79,557.12 : x - Step 2: Convert to fraction form
139,987.53/193,177.98 = 79,557.12/x - Step 3: Cross multiply
139,987.53x = 193,177.98 × 79,557.12 - Step 4: Simplify right side
139,987.53x = 15,368,683,736.22 - Step 5: Solve for x
x = 15,368,683,736.22/139,987.53 - Step 6: Final answer
x = 109,786.09
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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.