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Finding the Fourth Proportional to 73,003.20, 109,504.80 and 20,412.60

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Solution

The fourth proportional to 73,003.20, 109,504.80 and 20,412.60 is: 30,618.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,003.20 : 109,504.80 = 20,412.60 : x
  2. Step 2: Convert to fraction form
    73,003.20/109,504.80 = 20,412.60/x
  3. Step 3: Cross multiply
    73,003.20x = 109,504.80 × 20,412.60
  4. Step 4: Simplify right side
    73,003.20x = 2,235,277,680.48
  5. Step 5: Solve for x
    x = 2,235,277,680.48/73,003.20
  6. Step 6: Final answer
    x = 30,618.90

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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.