Finding the Fourth Proportional to 77,065.99, 115,601.36 and 20,905.88
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Solution
The fourth proportional to 77,065.99, 115,601.36 and 20,905.88 is: 31,359.46
Step by Step Solution
- Step 1: Write the proportion equation
77,065.99 : 115,601.36 = 20,905.88 : x - Step 2: Convert to fraction form
77,065.99/115,601.36 = 20,905.88/x - Step 3: Cross multiply
77,065.99x = 115,601.36 × 20,905.88 - Step 4: Simplify right side
77,065.99x = 2,416,747,477.46 - Step 5: Solve for x
x = 2,416,747,477.46/77,065.99 - Step 6: Final answer
x = 31,359.46
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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.