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Finding the Fourth Proportional to 74,409.32, 111,614.88 and 21,819.87

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Solution

The fourth proportional to 74,409.32, 111,614.88 and 21,819.87 is: 32,730.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,409.32 : 111,614.88 = 21,819.87 : x
  2. Step 2: Convert to fraction form
    74,409.32/111,614.88 = 21,819.87/x
  3. Step 3: Cross multiply
    74,409.32x = 111,614.88 × 21,819.87
  4. Step 4: Simplify right side
    74,409.32x = 2,435,422,171.67
  5. Step 5: Solve for x
    x = 2,435,422,171.67/74,409.32
  6. Step 6: Final answer
    x = 32,730.07

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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.