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Finding the Fourth Proportional to 55,243.80, 82,865.70 and 20,178.90

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Solution

The fourth proportional to 55,243.80, 82,865.70 and 20,178.90 is: 30,268.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,243.80 : 82,865.70 = 20,178.90 : x
  2. Step 2: Convert to fraction form
    55,243.80/82,865.70 = 20,178.90/x
  3. Step 3: Cross multiply
    55,243.80x = 82,865.70 × 20,178.90
  4. Step 4: Simplify right side
    55,243.80x = 1,672,138,673.73
  5. Step 5: Solve for x
    x = 1,672,138,673.73/55,243.80
  6. Step 6: Final answer
    x = 30,268.35

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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.