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Finding the Fourth Proportional to 69,173.67, 103,898.78 and 66,903.74

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Solution

The fourth proportional to 69,173.67, 103,898.78 and 66,903.74 is: 100,489.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,173.67 : 103,898.78 = 66,903.74 : x
  2. Step 2: Convert to fraction form
    69,173.67/103,898.78 = 66,903.74/x
  3. Step 3: Cross multiply
    69,173.67x = 103,898.78 × 66,903.74
  4. Step 4: Simplify right side
    69,173.67x = 6,951,217,710.70
  5. Step 5: Solve for x
    x = 6,951,217,710.70/69,173.67
  6. Step 6: Final answer
    x = 100,489.36

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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.