Finding the Fourth Proportional to 138,202.94, 190,729.74 and 77,779.40
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Solution
The fourth proportional to 138,202.94, 190,729.74 and 77,779.40 is: 107,341.02
Step by Step Solution
- Step 1: Write the proportion equation
138,202.94 : 190,729.74 = 77,779.40 : x - Step 2: Convert to fraction form
138,202.94/190,729.74 = 77,779.40/x - Step 3: Cross multiply
138,202.94x = 190,729.74 × 77,779.40 - Step 4: Simplify right side
138,202.94x = 14,834,844,739.36 - Step 5: Solve for x
x = 14,834,844,739.36/138,202.94 - Step 6: Final answer
x = 107,341.02
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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.