Finding the Fourth Proportional to 81,432.21, 122,128.65 and 34,021.68
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Solution
The fourth proportional to 81,432.21, 122,128.65 and 34,021.68 is: 51,024.30
Step by Step Solution
- Step 1: Write the proportion equation
81,432.21 : 122,128.65 = 34,021.68 : x - Step 2: Convert to fraction form
81,432.21/122,128.65 = 34,021.68/x - Step 3: Cross multiply
81,432.21x = 122,128.65 × 34,021.68 - Step 4: Simplify right side
81,432.21x = 4,155,021,849.13 - Step 5: Solve for x
x = 4,155,021,849.13/81,432.21 - Step 6: Final answer
x = 51,024.30
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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.