Finding the Fourth Proportional to 72,957.68, 100,681.60 and 39,423.68
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Solution
The fourth proportional to 72,957.68, 100,681.60 and 39,423.68 is: 54,404.68
Step by Step Solution
- Step 1: Write the proportion equation
72,957.68 : 100,681.60 = 39,423.68 : x - Step 2: Convert to fraction form
72,957.68/100,681.60 = 39,423.68/x - Step 3: Cross multiply
72,957.68x = 100,681.60 × 39,423.68 - Step 4: Simplify right side
72,957.68x = 3,969,239,180.29 - Step 5: Solve for x
x = 3,969,239,180.29/72,957.68 - Step 6: Final answer
x = 54,404.68
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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.