Home / 57,121.55-78,830.19-31,627.91

Finding the Fourth Proportional to 57,121.55, 78,830.19 and 31,627.91

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Solution

The fourth proportional to 57,121.55, 78,830.19 and 31,627.91 is: 43,647.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,121.55 : 78,830.19 = 31,627.91 : x
  2. Step 2: Convert to fraction form
    57,121.55/78,830.19 = 31,627.91/x
  3. Step 3: Cross multiply
    57,121.55x = 78,830.19 × 31,627.91
  4. Step 4: Simplify right side
    57,121.55x = 2,493,233,760.45
  5. Step 5: Solve for x
    x = 2,493,233,760.45/57,121.55
  6. Step 6: Final answer
    x = 43,647.87

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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.