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Finding the Fourth Proportional to 213,630.20, 320,474.10 and 73,431.80

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Solution

The fourth proportional to 213,630.20, 320,474.10 and 73,431.80 is: 110,157.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,630.20 : 320,474.10 = 73,431.80 : x
  2. Step 2: Convert to fraction form
    213,630.20/320,474.10 = 73,431.80/x
  3. Step 3: Cross multiply
    213,630.20x = 320,474.10 × 73,431.80
  4. Step 4: Simplify right side
    213,630.20x = 23,532,990,016.38
  5. Step 5: Solve for x
    x = 23,532,990,016.38/213,630.20
  6. Step 6: Final answer
    x = 110,157.60

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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.