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Finding the Fourth Proportional to 55,272.55, 82,914.90 and 20,219.80

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Solution

The fourth proportional to 55,272.55, 82,914.90 and 20,219.80 is: 30,331.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,272.55 : 82,914.90 = 20,219.80 : x
  2. Step 2: Convert to fraction form
    55,272.55/82,914.90 = 20,219.80/x
  3. Step 3: Cross multiply
    55,272.55x = 82,914.90 × 20,219.80
  4. Step 4: Simplify right side
    55,272.55x = 1,676,522,695.02
  5. Step 5: Solve for x
    x = 1,676,522,695.02/55,272.55
  6. Step 6: Final answer
    x = 30,331.92

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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.