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Finding the Fourth Proportional to 38,251.90, 57,120.28 and 31,245.90

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Solution

The fourth proportional to 38,251.90, 57,120.28 and 31,245.90 is: 46,658.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,251.90 : 57,120.28 = 31,245.90 : x
  2. Step 2: Convert to fraction form
    38,251.90/57,120.28 = 31,245.90/x
  3. Step 3: Cross multiply
    38,251.90x = 57,120.28 × 31,245.90
  4. Step 4: Simplify right side
    38,251.90x = 1,784,774,556.85
  5. Step 5: Solve for x
    x = 1,784,774,556.85/38,251.90
  6. Step 6: Final answer
    x = 46,658.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.