Finding the Fourth Proportional to 122,106.80, 168,515.16 and 79,779.44
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Solution
The fourth proportional to 122,106.80, 168,515.16 and 79,779.44 is: 110,100.71
Step by Step Solution
- Step 1: Write the proportion equation
122,106.80 : 168,515.16 = 79,779.44 : x - Step 2: Convert to fraction form
122,106.80/168,515.16 = 79,779.44/x - Step 3: Cross multiply
122,106.80x = 168,515.16 × 79,779.44 - Step 4: Simplify right side
122,106.80x = 13,444,045,096.31 - Step 5: Solve for x
x = 13,444,045,096.31/122,106.80 - Step 6: Final answer
x = 110,100.71
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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.