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Finding the Fourth Proportional to 50,890.20, 70,228.90 and 28,230.68

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Solution

The fourth proportional to 50,890.20, 70,228.90 and 28,230.68 is: 38,958.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,890.20 : 70,228.90 = 28,230.68 : x
  2. Step 2: Convert to fraction form
    50,890.20/70,228.90 = 28,230.68/x
  3. Step 3: Cross multiply
    50,890.20x = 70,228.90 × 28,230.68
  4. Step 4: Simplify right side
    50,890.20x = 1,982,609,339.08
  5. Step 5: Solve for x
    x = 1,982,609,339.08/50,890.20
  6. Step 6: Final answer
    x = 38,958.57

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1.5x scale

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.