Home / 57,221.76-78,969.68-31,731.04

Finding the Fourth Proportional to 57,221.76, 78,969.68 and 31,731.04

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Solution

The fourth proportional to 57,221.76, 78,969.68 and 31,731.04 is: 43,790.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,221.76 : 78,969.68 = 31,731.04 : x
  2. Step 2: Convert to fraction form
    57,221.76/78,969.68 = 31,731.04/x
  3. Step 3: Cross multiply
    57,221.76x = 78,969.68 × 31,731.04
  4. Step 4: Simplify right side
    57,221.76x = 2,505,790,074.87
  5. Step 5: Solve for x
    x = 2,505,790,074.87/57,221.76
  6. Step 6: Final answer
    x = 43,790.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.