Finding the Fourth Proportional to 103,638.19, 155,460.62 and 28,759.09
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Solution
The fourth proportional to 103,638.19, 155,460.62 and 28,759.09 is: 43,139.56
Step by Step Solution
- Step 1: Write the proportion equation
103,638.19 : 155,460.62 = 28,759.09 : x - Step 2: Convert to fraction form
103,638.19/155,460.62 = 28,759.09/x - Step 3: Cross multiply
103,638.19x = 155,460.62 × 28,759.09 - Step 4: Simplify right side
103,638.19x = 4,470,905,962.04 - Step 5: Solve for x
x = 4,470,905,962.04/103,638.19 - Step 6: Final answer
x = 43,139.56
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.