Finding the Fourth Proportional to 112,707.21, 155,538.38 and 61,722.09
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Solution
The fourth proportional to 112,707.21, 155,538.38 and 61,722.09 is: 85,177.81
Step by Step Solution
- Step 1: Write the proportion equation
112,707.21 : 155,538.38 = 61,722.09 : x - Step 2: Convert to fraction form
112,707.21/155,538.38 = 61,722.09/x - Step 3: Cross multiply
112,707.21x = 155,538.38 × 61,722.09 - Step 4: Simplify right side
112,707.21x = 9,600,153,580.20 - Step 5: Solve for x
x = 9,600,153,580.20/112,707.21 - Step 6: Final answer
x = 85,177.81
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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.