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Finding the Fourth Proportional to 55,278.45, 82,899.45 and 20,213.55

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Solution

The fourth proportional to 55,278.45, 82,899.45 and 20,213.55 is: 30,313.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,278.45 : 82,899.45 = 20,213.55 : x
  2. Step 2: Convert to fraction form
    55,278.45/82,899.45 = 20,213.55/x
  3. Step 3: Cross multiply
    55,278.45x = 82,899.45 × 20,213.55
  4. Step 4: Simplify right side
    55,278.45x = 1,675,692,177.55
  5. Step 5: Solve for x
    x = 1,675,692,177.55/55,278.45
  6. Step 6: Final answer
    x = 30,313.66

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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.