Finding the Fourth Proportional to 230,378.85, 317,925.99 and 128,401.47
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Solution
The fourth proportional to 230,378.85, 317,925.99 and 128,401.47 is: 177,195.80
Step by Step Solution
- Step 1: Write the proportion equation
230,378.85 : 317,925.99 = 128,401.47 : x - Step 2: Convert to fraction form
230,378.85/317,925.99 = 128,401.47/x - Step 3: Cross multiply
230,378.85x = 317,925.99 × 128,401.47 - Step 4: Simplify right side
230,378.85x = 40,822,164,467.21 - Step 5: Solve for x
x = 40,822,164,467.21/230,378.85 - Step 6: Final answer
x = 177,195.80
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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.