Finding the Fourth Proportional to 76,985.60, 115,420.80 and 41,964.80
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Solution
The fourth proportional to 76,985.60, 115,420.80 and 41,964.80 is: 62,915.80
Step by Step Solution
- Step 1: Write the proportion equation
76,985.60 : 115,420.80 = 41,964.80 : x - Step 2: Convert to fraction form
76,985.60/115,420.80 = 41,964.80/x - Step 3: Cross multiply
76,985.60x = 115,420.80 × 41,964.80 - Step 4: Simplify right side
76,985.60x = 4,843,610,787.84 - Step 5: Solve for x
x = 4,843,610,787.84/76,985.60 - Step 6: Final answer
x = 62,915.80
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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.