Finding the Fourth Proportional to 230,731.99, 318,409.55 and 128,756.38
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Solution
The fourth proportional to 230,731.99, 318,409.55 and 128,756.38 is: 177,683.47
Step by Step Solution
- Step 1: Write the proportion equation
230,731.99 : 318,409.55 = 128,756.38 : x - Step 2: Convert to fraction form
230,731.99/318,409.55 = 128,756.38/x - Step 3: Cross multiply
230,731.99x = 318,409.55 × 128,756.38 - Step 4: Simplify right side
230,731.99x = 40,997,260,371.65 - Step 5: Solve for x
x = 40,997,260,371.65/230,731.99 - Step 6: Final answer
x = 177,683.47
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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.