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Finding the Fourth Proportional to 74,263.92, 111,400.74 and 21,669

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Solution

The fourth proportional to 74,263.92, 111,400.74 and 21,669 is: 32,504.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,263.92 : 111,400.74 = 21,669 : x
  2. Step 2: Convert to fraction form
    74,263.92/111,400.74 = 21,669/x
  3. Step 3: Cross multiply
    74,263.92x = 111,400.74 × 21,669
  4. Step 4: Simplify right side
    74,263.92x = 2,413,942,635.06
  5. Step 5: Solve for x
    x = 2,413,942,635.06/74,263.92
  6. Step 6: Final answer
    x = 32,504.92

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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.