Finding the Fourth Proportional to 83,776.64, 115,729.44 and 76,209.62
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Solution
The fourth proportional to 83,776.64, 115,729.44 and 76,209.62 is: 105,276.32
Step by Step Solution
- Step 1: Write the proportion equation
83,776.64 : 115,729.44 = 76,209.62 : x - Step 2: Convert to fraction form
83,776.64/115,729.44 = 76,209.62/x - Step 3: Cross multiply
83,776.64x = 115,729.44 × 76,209.62 - Step 4: Simplify right side
83,776.64x = 8,819,696,645.21 - Step 5: Solve for x
x = 8,819,696,645.21/83,776.64 - Step 6: Final answer
x = 105,276.32
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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.