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Finding the Fourth Proportional to 55,464.80, 83,197.20 and 20,399.90

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Solution

The fourth proportional to 55,464.80, 83,197.20 and 20,399.90 is: 30,599.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,464.80 : 83,197.20 = 20,399.90 : x
  2. Step 2: Convert to fraction form
    55,464.80/83,197.20 = 20,399.90/x
  3. Step 3: Cross multiply
    55,464.80x = 83,197.20 × 20,399.90
  4. Step 4: Simplify right side
    55,464.80x = 1,697,214,560.28
  5. Step 5: Solve for x
    x = 1,697,214,560.28/55,464.80
  6. Step 6: Final answer
    x = 30,599.85

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Similar ratio
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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.