Finding the Fourth Proportional to 76,913.60, 115,370.40 and 47,235.20
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Solution
The fourth proportional to 76,913.60, 115,370.40 and 47,235.20 is: 70,852.80
Step by Step Solution
- Step 1: Write the proportion equation
76,913.60 : 115,370.40 = 47,235.20 : x - Step 2: Convert to fraction form
76,913.60/115,370.40 = 47,235.20/x - Step 3: Cross multiply
76,913.60x = 115,370.40 × 47,235.20 - Step 4: Simplify right side
76,913.60x = 5,449,543,918.08 - Step 5: Solve for x
x = 5,449,543,918.08/76,913.60 - Step 6: Final answer
x = 70,852.80
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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.