Finding the Fourth Proportional to 77,879.05, 107,473.13 and 42,069.05
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Solution
The fourth proportional to 77,879.05, 107,473.13 and 42,069.05 is: 58,055.31
Step by Step Solution
- Step 1: Write the proportion equation
77,879.05 : 107,473.13 = 42,069.05 : x - Step 2: Convert to fraction form
77,879.05/107,473.13 = 42,069.05/x - Step 3: Cross multiply
77,879.05x = 107,473.13 × 42,069.05 - Step 4: Simplify right side
77,879.05x = 4,521,292,897.24 - Step 5: Solve for x
x = 4,521,292,897.24/77,879.05 - Step 6: Final answer
x = 58,055.31
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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.