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Finding the Fourth Proportional to 74,269.39, 111,410.79 and 20,961.95

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Solution

The fourth proportional to 74,269.39, 111,410.79 and 20,961.95 is: 31,444.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,269.39 : 111,410.79 = 20,961.95 : x
  2. Step 2: Convert to fraction form
    74,269.39/111,410.79 = 20,961.95/x
  3. Step 3: Cross multiply
    74,269.39x = 111,410.79 × 20,961.95
  4. Step 4: Simplify right side
    74,269.39x = 2,335,387,409.44
  5. Step 5: Solve for x
    x = 2,335,387,409.44/74,269.39
  6. Step 6: Final answer
    x = 31,444.82

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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.