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Finding the Fourth Proportional to 74,581.92, 111,878.64 and 21,277.68

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Solution

The fourth proportional to 74,581.92, 111,878.64 and 21,277.68 is: 31,918.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,581.92 : 111,878.64 = 21,277.68 : x
  2. Step 2: Convert to fraction form
    74,581.92/111,878.64 = 21,277.68/x
  3. Step 3: Cross multiply
    74,581.92x = 111,878.64 × 21,277.68
  4. Step 4: Simplify right side
    74,581.92x = 2,380,517,900.76
  5. Step 5: Solve for x
    x = 2,380,517,900.76/74,581.92
  6. Step 6: Final answer
    x = 31,918.16

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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.