Finding the Fourth Proportional to 128,705.93, 177,614.23 and 78,404.93
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Solution
The fourth proportional to 128,705.93, 177,614.23 and 78,404.93 is: 108,198.83
Step by Step Solution
- Step 1: Write the proportion equation
128,705.93 : 177,614.23 = 78,404.93 : x - Step 2: Convert to fraction form
128,705.93/177,614.23 = 78,404.93/x - Step 3: Cross multiply
128,705.93x = 177,614.23 × 78,404.93 - Step 4: Simplify right side
128,705.93x = 13,925,830,878.13 - Step 5: Solve for x
x = 13,925,830,878.13/128,705.93 - Step 6: Final answer
x = 108,198.83
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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.