Finding the Fourth Proportional to 228,879.68, 315,849.12 and 128,275.52
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Solution
The fourth proportional to 228,879.68, 315,849.12 and 128,275.52 is: 177,017.51
Step by Step Solution
- Step 1: Write the proportion equation
228,879.68 : 315,849.12 = 128,275.52 : x - Step 2: Convert to fraction form
228,879.68/315,849.12 = 128,275.52/x - Step 3: Cross multiply
228,879.68x = 315,849.12 × 128,275.52 - Step 4: Simplify right side
228,879.68x = 40,515,710,109.54 - Step 5: Solve for x
x = 40,515,710,109.54/228,879.68 - Step 6: Final answer
x = 177,017.51
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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.