Finding the Fourth Proportional to 128,447.01, 177,147.95 and 77,448.60
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Solution
The fourth proportional to 128,447.01, 177,147.95 and 77,448.60 is: 106,813.39
Step by Step Solution
- Step 1: Write the proportion equation
128,447.01 : 177,147.95 = 77,448.60 : x - Step 2: Convert to fraction form
128,447.01/177,147.95 = 77,448.60/x - Step 3: Cross multiply
128,447.01x = 177,147.95 × 77,448.60 - Step 4: Simplify right side
128,447.01x = 13,719,860,333.13 - Step 5: Solve for x
x = 13,719,860,333.13/128,447.01 - Step 6: Final answer
x = 106,813.39
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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.