Finding the Fourth Proportional to 156,078.70, 233,772.45 and 128,430.70
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Solution
The fourth proportional to 156,078.70, 233,772.45 and 128,430.70 is: 192,361.67
Step by Step Solution
- Step 1: Write the proportion equation
156,078.70 : 233,772.45 = 128,430.70 : x - Step 2: Convert to fraction form
156,078.70/233,772.45 = 128,430.70/x - Step 3: Cross multiply
156,078.70x = 233,772.45 × 128,430.70 - Step 4: Simplify right side
156,078.70x = 30,023,559,394.22 - Step 5: Solve for x
x = 30,023,559,394.22/156,078.70 - Step 6: Final answer
x = 192,361.67
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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.