Finding the Fourth Proportional to 77,855.65, 107,440.78 and 42,045.65
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Solution
The fourth proportional to 77,855.65, 107,440.78 and 42,045.65 is: 58,022.99
Step by Step Solution
- Step 1: Write the proportion equation
77,855.65 : 107,440.78 = 42,045.65 : x - Step 2: Convert to fraction form
77,855.65/107,440.78 = 42,045.65/x - Step 3: Cross multiply
77,855.65x = 107,440.78 × 42,045.65 - Step 4: Simplify right side
77,855.65x = 4,517,417,221.38 - Step 5: Solve for x
x = 4,517,417,221.38/77,855.65 - Step 6: Final answer
x = 58,022.99
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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.