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Finding the Fourth Proportional to 50,990.80, 76,456.50 and 19,789.60

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Solution

The fourth proportional to 50,990.80, 76,456.50 and 19,789.60 is: 29,672.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,990.80 : 76,456.50 = 19,789.60 : x
  2. Step 2: Convert to fraction form
    50,990.80/76,456.50 = 19,789.60/x
  3. Step 3: Cross multiply
    50,990.80x = 76,456.50 × 19,789.60
  4. Step 4: Simplify right side
    50,990.80x = 1,513,043,552.40
  5. Step 5: Solve for x
    x = 1,513,043,552.40/50,990.80
  6. Step 6: Final answer
    x = 29,672.87

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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.