Home / 57,128.60-78,836.49-31,634.42

Finding the Fourth Proportional to 57,128.60, 78,836.49 and 31,634.42

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Solution

The fourth proportional to 57,128.60, 78,836.49 and 31,634.42 is: 43,654.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,128.60 : 78,836.49 = 31,634.42 : x
  2. Step 2: Convert to fraction form
    57,128.60/78,836.49 = 31,634.42/x
  3. Step 3: Cross multiply
    57,128.60x = 78,836.49 × 31,634.42
  4. Step 4: Simplify right side
    57,128.60x = 2,493,946,635.99
  5. Step 5: Solve for x
    x = 2,493,946,635.99/57,128.60
  6. Step 6: Final answer
    x = 43,654.96

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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.