Finding the Fourth Proportional to 77,309.80, 115,964.70 and 21,905.80
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Solution
The fourth proportional to 77,309.80, 115,964.70 and 21,905.80 is: 32,858.70
Step by Step Solution
- Step 1: Write the proportion equation
77,309.80 : 115,964.70 = 21,905.80 : x - Step 2: Convert to fraction form
77,309.80/115,964.70 = 21,905.80/x - Step 3: Cross multiply
77,309.80x = 115,964.70 × 21,905.80 - Step 4: Simplify right side
77,309.80x = 2,540,299,525.26 - Step 5: Solve for x
x = 2,540,299,525.26/77,309.80 - Step 6: Final answer
x = 32,858.70
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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.