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Finding the Fourth Proportional to 45,387.80, 68,082.20 and 13,803.00

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Solution

The fourth proportional to 45,387.80, 68,082.20 and 13,803.00 is: 20,704.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,387.80 : 68,082.20 = 13,803.00 : x
  2. Step 2: Convert to fraction form
    45,387.80/68,082.20 = 13,803.00/x
  3. Step 3: Cross multiply
    45,387.80x = 68,082.20 × 13,803.00
  4. Step 4: Simplify right side
    45,387.80x = 939,738,367.38
  5. Step 5: Solve for x
    x = 939,738,367.38/45,387.80
  6. Step 6: Final answer
    x = 20,704.65

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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.