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Finding the Fourth Proportional to 74,383.92, 111,561.30 and 21,779.28

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Solution

The fourth proportional to 74,383.92, 111,561.30 and 21,779.28 is: 32,664.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,383.92 : 111,561.30 = 21,779.28 : x
  2. Step 2: Convert to fraction form
    74,383.92/111,561.30 = 21,779.28/x
  3. Step 3: Cross multiply
    74,383.92x = 111,561.30 × 21,779.28
  4. Step 4: Simplify right side
    74,383.92x = 2,429,724,789.86
  5. Step 5: Solve for x
    x = 2,429,724,789.86/74,383.92
  6. Step 6: Final answer
    x = 32,664.65

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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.