Finding the Fourth Proportional to 100,848.13, 139,173.74 and 55,529.44
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Solution
The fourth proportional to 100,848.13, 139,173.74 and 55,529.44 is: 76,632.45
Step by Step Solution
- Step 1: Write the proportion equation
100,848.13 : 139,173.74 = 55,529.44 : x - Step 2: Convert to fraction form
100,848.13/139,173.74 = 55,529.44/x - Step 3: Cross multiply
100,848.13x = 139,173.74 × 55,529.44 - Step 4: Simplify right side
100,848.13x = 7,728,239,567.26 - Step 5: Solve for x
x = 7,728,239,567.26/100,848.13 - Step 6: Final answer
x = 76,632.45
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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.