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Finding the Fourth Proportional to 48,672.20, 72,967.80 and 20,613.80

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Solution

The fourth proportional to 48,672.20, 72,967.80 and 20,613.80 is: 30,903.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,672.20 : 72,967.80 = 20,613.80 : x
  2. Step 2: Convert to fraction form
    48,672.20/72,967.80 = 20,613.80/x
  3. Step 3: Cross multiply
    48,672.20x = 72,967.80 × 20,613.80
  4. Step 4: Simplify right side
    48,672.20x = 1,504,143,635.64
  5. Step 5: Solve for x
    x = 1,504,143,635.64/48,672.20
  6. Step 6: Final answer
    x = 30,903.55

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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.