Finding the Fourth Proportional to 138,510.80, 207,247.80 and 91,854.80
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Solution
The fourth proportional to 138,510.80, 207,247.80 and 91,854.80 is: 137,438.42
Step by Step Solution
- Step 1: Write the proportion equation
138,510.80 : 207,247.80 = 91,854.80 : x - Step 2: Convert to fraction form
138,510.80/207,247.80 = 91,854.80/x - Step 3: Cross multiply
138,510.80x = 207,247.80 × 91,854.80 - Step 4: Simplify right side
138,510.80x = 19,036,705,219.44 - Step 5: Solve for x
x = 19,036,705,219.44/138,510.80 - Step 6: Final answer
x = 137,438.42
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.