Finding the Fourth Proportional to 81,208.40, 121,808.28 and 25,800.08
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Solution
The fourth proportional to 81,208.40, 121,808.28 and 25,800.08 is: 38,698.75
Step by Step Solution
- Step 1: Write the proportion equation
81,208.40 : 121,808.28 = 25,800.08 : x - Step 2: Convert to fraction form
81,208.40/121,808.28 = 25,800.08/x - Step 3: Cross multiply
81,208.40x = 121,808.28 × 25,800.08 - Step 4: Simplify right side
81,208.40x = 3,142,663,368.66 - Step 5: Solve for x
x = 3,142,663,368.66/81,208.40 - Step 6: Final answer
x = 38,698.75
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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.