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Finding the Fourth Proportional to 69,288.20, 103,672.80 and 49,343.80

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Solution

The fourth proportional to 69,288.20, 103,672.80 and 49,343.80 is: 73,830.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,288.20 : 103,672.80 = 49,343.80 : x
  2. Step 2: Convert to fraction form
    69,288.20/103,672.80 = 49,343.80/x
  3. Step 3: Cross multiply
    69,288.20x = 103,672.80 × 49,343.80
  4. Step 4: Simplify right side
    69,288.20x = 5,115,609,908.64
  5. Step 5: Solve for x
    x = 5,115,609,908.64/69,288.20
  6. Step 6: Final answer
    x = 73,830.90

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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.