Finding the Fourth Proportional to 83,615.48, 115,107.99 and 72,440.18
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Solution
The fourth proportional to 83,615.48, 115,107.99 and 72,440.18 is: 99,723.68
Step by Step Solution
- Step 1: Write the proportion equation
83,615.48 : 115,107.99 = 72,440.18 : x - Step 2: Convert to fraction form
83,615.48/115,107.99 = 72,440.18/x - Step 3: Cross multiply
83,615.48x = 115,107.99 × 72,440.18 - Step 4: Simplify right side
83,615.48x = 8,338,443,515.04 - Step 5: Solve for x
x = 8,338,443,515.04/83,615.48 - Step 6: Final answer
x = 99,723.68
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1.5x scale
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.