Home / 57,135.14-78,835.30-31,640.27

Finding the Fourth Proportional to 57,135.14, 78,835.30 and 31,640.27

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Solution

The fourth proportional to 57,135.14, 78,835.30 and 31,640.27 is: 43,657.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,135.14 : 78,835.30 = 31,640.27 : x
  2. Step 2: Convert to fraction form
    57,135.14/78,835.30 = 31,640.27/x
  3. Step 3: Cross multiply
    57,135.14x = 78,835.30 × 31,640.27
  4. Step 4: Simplify right side
    57,135.14x = 2,494,369,704.25
  5. Step 5: Solve for x
    x = 2,494,369,704.25/57,135.14
  6. Step 6: Final answer
    x = 43,657.37

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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.