Finding the Fourth Proportional to 77,643.91, 107,215.82 and 73,658.08
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Solution
The fourth proportional to 77,643.91, 107,215.82 and 73,658.08 is: 101,711.92
Step by Step Solution
- Step 1: Write the proportion equation
77,643.91 : 107,215.82 = 73,658.08 : x - Step 2: Convert to fraction form
77,643.91/107,215.82 = 73,658.08/x - Step 3: Cross multiply
77,643.91x = 107,215.82 × 73,658.08 - Step 4: Simplify right side
77,643.91x = 7,897,311,446.83 - Step 5: Solve for x
x = 7,897,311,446.83/77,643.91 - Step 6: Final answer
x = 101,711.92
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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.