Finding the Fourth Proportional to 78,110.06, 107,820.18 and 51,261.26
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Solution
The fourth proportional to 78,110.06, 107,820.18 and 51,261.26 is: 70,759.11
Step by Step Solution
- Step 1: Write the proportion equation
78,110.06 : 107,820.18 = 51,261.26 : x - Step 2: Convert to fraction form
78,110.06/107,820.18 = 51,261.26/x - Step 3: Cross multiply
78,110.06x = 107,820.18 × 51,261.26 - Step 4: Simplify right side
78,110.06x = 5,526,997,741.13 - Step 5: Solve for x
x = 5,526,997,741.13/78,110.06 - Step 6: Final answer
x = 70,759.11
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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.