Finding the Fourth Proportional to 128,125.24, 176,812.78 and 71,536.60
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Solution
The fourth proportional to 128,125.24, 176,812.78 and 71,536.60 is: 98,720.48
Step by Step Solution
- Step 1: Write the proportion equation
128,125.24 : 176,812.78 = 71,536.60 : x - Step 2: Convert to fraction form
128,125.24/176,812.78 = 71,536.60/x - Step 3: Cross multiply
128,125.24x = 176,812.78 × 71,536.60 - Step 4: Simplify right side
128,125.24x = 12,648,585,117.75 - Step 5: Solve for x
x = 12,648,585,117.75/128,125.24 - Step 6: Final answer
x = 98,720.48
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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.