Finding the Fourth Proportional to 128,611.08, 177,468.66 and 74,884.77
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Solution
The fourth proportional to 128,611.08, 177,468.66 and 74,884.77 is: 103,332.46
Step by Step Solution
- Step 1: Write the proportion equation
128,611.08 : 177,468.66 = 74,884.77 : x - Step 2: Convert to fraction form
128,611.08/177,468.66 = 74,884.77/x - Step 3: Cross multiply
128,611.08x = 177,468.66 × 74,884.77 - Step 4: Simplify right side
128,611.08x = 13,289,699,786.31 - Step 5: Solve for x
x = 13,289,699,786.31/128,611.08 - Step 6: Final answer
x = 103,332.46
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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.