Finding the Fourth Proportional to 80,907.60, 121,415.39 and 28,317.09
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Solution
The fourth proportional to 80,907.60, 121,415.39 and 28,317.09 is: 42,494.53
Step by Step Solution
- Step 1: Write the proportion equation
80,907.60 : 121,415.39 = 28,317.09 : x - Step 2: Convert to fraction form
80,907.60/121,415.39 = 28,317.09/x - Step 3: Cross multiply
80,907.60x = 121,415.39 × 28,317.09 - Step 4: Simplify right side
80,907.60x = 3,438,130,526.02 - Step 5: Solve for x
x = 3,438,130,526.02/80,907.60 - Step 6: Final answer
x = 42,494.53
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.