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Finding the Fourth Proportional to 74,378.70, 111,568.03 and 18,974.70

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Solution

The fourth proportional to 74,378.70, 111,568.03 and 18,974.70 is: 28,462.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,378.70 : 111,568.03 = 18,974.70 : x
  2. Step 2: Convert to fraction form
    74,378.70/111,568.03 = 18,974.70/x
  3. Step 3: Cross multiply
    74,378.70x = 111,568.03 × 18,974.70
  4. Step 4: Simplify right side
    74,378.70x = 2,116,969,898.84
  5. Step 5: Solve for x
    x = 2,116,969,898.84/74,378.70
  6. Step 6: Final answer
    x = 28,462.04

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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.