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Finding the Fourth Proportional to 50,710.80, 76,128.60 and 31,990.80

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Solution

The fourth proportional to 50,710.80, 76,128.60 and 31,990.80 is: 48,025.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,710.80 : 76,128.60 = 31,990.80 : x
  2. Step 2: Convert to fraction form
    50,710.80/76,128.60 = 31,990.80/x
  3. Step 3: Cross multiply
    50,710.80x = 76,128.60 × 31,990.80
  4. Step 4: Simplify right side
    50,710.80x = 2,435,414,816.88
  5. Step 5: Solve for x
    x = 2,435,414,816.88/50,710.80
  6. Step 6: Final answer
    x = 48,025.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.