Finding the Fourth Proportional to 100,655.16, 138,924.26 and 76,739.12
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Solution
The fourth proportional to 100,655.16, 138,924.26 and 76,739.12 is: 105,915.34
Step by Step Solution
- Step 1: Write the proportion equation
100,655.16 : 138,924.26 = 76,739.12 : x - Step 2: Convert to fraction form
100,655.16/138,924.26 = 76,739.12/x - Step 3: Cross multiply
100,655.16x = 138,924.26 × 76,739.12 - Step 4: Simplify right side
100,655.16x = 10,660,925,459.05 - Step 5: Solve for x
x = 10,660,925,459.05/100,655.16 - Step 6: Final answer
x = 105,915.34
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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.