Finding the Fourth Proportional to 83,621.99, 115,420.47 and 51,772.79
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Solution
The fourth proportional to 83,621.99, 115,420.47 and 51,772.79 is: 71,460.15
Step by Step Solution
- Step 1: Write the proportion equation
83,621.99 : 115,420.47 = 51,772.79 : x - Step 2: Convert to fraction form
83,621.99/115,420.47 = 51,772.79/x - Step 3: Cross multiply
83,621.99x = 115,420.47 × 51,772.79 - Step 4: Simplify right side
83,621.99x = 5,975,639,755.01 - Step 5: Solve for x
x = 5,975,639,755.01/83,621.99 - Step 6: Final answer
x = 71,460.15
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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.