Finding the Fourth Proportional to 81,202.90, 121,804.35 and 53,209.30
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Solution
The fourth proportional to 81,202.90, 121,804.35 and 53,209.30 is: 79,813.95
Step by Step Solution
- Step 1: Write the proportion equation
81,202.90 : 121,804.35 = 53,209.30 : x - Step 2: Convert to fraction form
81,202.90/121,804.35 = 53,209.30/x - Step 3: Cross multiply
81,202.90x = 121,804.35 × 53,209.30 - Step 4: Simplify right side
81,202.90x = 6,481,124,200.46 - Step 5: Solve for x
x = 6,481,124,200.46/81,202.90 - Step 6: Final answer
x = 79,813.95
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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.