Finding the Fourth Proportional to 128,778.04, 177,725.10 and 77,816.08
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Solution
The fourth proportional to 128,778.04, 177,725.10 and 77,816.08 is: 107,393.08
Step by Step Solution
- Step 1: Write the proportion equation
128,778.04 : 177,725.10 = 77,816.08 : x - Step 2: Convert to fraction form
128,778.04/177,725.10 = 77,816.08/x - Step 3: Cross multiply
128,778.04x = 177,725.10 × 77,816.08 - Step 4: Simplify right side
128,778.04x = 13,829,870,599.61 - Step 5: Solve for x
x = 13,829,870,599.61/128,778.04 - Step 6: Final answer
x = 107,393.08
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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.