Finding the Fourth Proportional to 128,460.59, 177,263.61 and 76,767.44
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Solution
The fourth proportional to 128,460.59, 177,263.61 and 76,767.44 is: 105,931.88
Step by Step Solution
- Step 1: Write the proportion equation
128,460.59 : 177,263.61 = 76,767.44 : x - Step 2: Convert to fraction form
128,460.59/177,263.61 = 76,767.44/x - Step 3: Cross multiply
128,460.59x = 177,263.61 × 76,767.44 - Step 4: Simplify right side
128,460.59x = 13,608,072,658.54 - Step 5: Solve for x
x = 13,608,072,658.54/128,460.59 - Step 6: Final answer
x = 105,931.88
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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.