Finding the Fourth Proportional to 112,974.21, 155,899.14 and 61,985.79
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Solution
The fourth proportional to 112,974.21, 155,899.14 and 61,985.79 is: 85,537.50
Step by Step Solution
- Step 1: Write the proportion equation
112,974.21 : 155,899.14 = 61,985.79 : x - Step 2: Convert to fraction form
112,974.21/155,899.14 = 61,985.79/x - Step 3: Cross multiply
112,974.21x = 155,899.14 × 61,985.79 - Step 4: Simplify right side
112,974.21x = 9,663,531,353.22 - Step 5: Solve for x
x = 9,663,531,353.22/112,974.21 - Step 6: Final answer
x = 85,537.50
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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.