Finding the Fourth Proportional to 128,422.24, 177,220.08 and 71,834.08
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Solution
The fourth proportional to 128,422.24, 177,220.08 and 71,834.08 is: 99,129.57
Step by Step Solution
- Step 1: Write the proportion equation
128,422.24 : 177,220.08 = 71,834.08 : x - Step 2: Convert to fraction form
128,422.24/177,220.08 = 71,834.08/x - Step 3: Cross multiply
128,422.24x = 177,220.08 × 71,834.08 - Step 4: Simplify right side
128,422.24x = 12,730,441,404.33 - Step 5: Solve for x
x = 12,730,441,404.33/128,422.24 - Step 6: Final answer
x = 99,129.57
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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.