Finding the Fourth Proportional to 81,830.64, 122,748.60 and 22,661.28
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Solution
The fourth proportional to 81,830.64, 122,748.60 and 22,661.28 is: 33,992.65
Step by Step Solution
- Step 1: Write the proportion equation
81,830.64 : 122,748.60 = 22,661.28 : x - Step 2: Convert to fraction form
81,830.64/122,748.60 = 22,661.28/x - Step 3: Cross multiply
81,830.64x = 122,748.60 × 22,661.28 - Step 4: Simplify right side
81,830.64x = 2,781,640,394.21 - Step 5: Solve for x
x = 2,781,640,394.21/81,830.64 - Step 6: Final answer
x = 33,992.65
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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.